At least 16 people have been confirmed killed in border clashes between Thailand and Cambodia, while tens of thousands have been moved to evacuation centres on both sides.

The conflict entered its second day on Friday, after tensions erupted into a deadly battle at the border on Thursday morning - the latest flashpoint in a long-running dispute that dates back more than a century.

Thailand's acting prime minister Phumtham Wechayachai on Friday warned that the conflict "could escalate into a state of war" - notable escalation of his rhetoric from Thursday, when he described the situation as a "clash".

The confrontation now involves heavy weapons, he added. Cambodia has meanwhile accused Thailand of using banned cluster munitions at a border area within Cambodian territory.

We're winding down our live coverage for today, but if you want to know more about why Thailand and Cambodia are fighting you can read our explainer here. There is also this analysis on why the root of this conflict is the breakdown of an old friendship.

Our latest news piece on the conflict is here.

Ian Tang
BBC Monitoring

The continued fighting between Thailand and Cambodia poses a problem for China, which has good ties with both countries and is treading carefully to avoid angering either.

China sees South East Asia as a crucial part of what it calls its “neighbourhood diplomacy”.

Beijing has close trade ties and invests heavily in infrastructure in both countries.

The trio cooperate on law enforcement, including the ongoing crackdown on cross-border cyber crimes, while China regularly conducts separate military drills with each country.

This could explain why Chinese foreign ministry spokesperson Guo Jiakun stressed Beijing's "just and impartial position" on the conflict when asked about the conflict on Thursday.

With Guo also stressing that China would “continue to promote talks for peace in our own way”, all eyes will be on whether Chinese Foreign Minister Wang Yi reaches out to his Thai and Cambodia counterparts in an effort to de-escalate the situation.

Cambodia on Friday accused Thailand of using banned cluster munitions at a border area within Cambodian territory, in what it said was a repeat of "brutal tactics" Thailand employed during clashes in 2011.

Thailand had admitted to using cluster bombs in 2011, but has not responded to these latest allegations.

Cluster munitions are banned in much of the world because of their indiscriminate effect on civilian populations.

The munitions work by scattering many small bomblets over a wide area, which can kill or maim civilians both during attacks and long afterwards. See below.

Jiraporn Sricham
BBC Thai

Thailand's closing of hospitals along its border with Cambodia has left many patients helpless.

Sirisa Bunmak's 90-year-old father was due to get treatment for hypertension. That appointment has ben cancelled, but the family has not been informed if it can be rescheduled.

Bunmak's elderly parents live in a village the Prakhon Chai district in Buri Ram Province, located about 50km from the Thai-Cambodian border, where fighting is ongoing. Her mother tells her that the sound of fighting can still be heard intermittently.

At least 11 hospitals along the border have been ordered to close and their patients evacuated, after a hospital in Phanom Dong Rak district was damaged in the fighting on Thursday.

People in her parents' village are fearful and panicking, Bunmak tells me.

"The images of homes and other hospitals damaged by weapons have made them feel even more unsafe and threatened,” she said.

Image source, Getty Images

The long-running dispute between Thailand and Cambodia dates back more than a century, when the borders of the two nations were drawn after the French occupation of Cambodia.

Things officially became hostile in 2008, when Cambodia tried to register an 11th Century temple located in the disputed area as a Unesco World Heritage Site - a move that was met with heated protest from Thailand.

Over the years there have been sporadic clashes that have seen soldiers and civilians killed on both sides.

The latest tensions ramped up in May after a Cambodian soldier was killed in a clash. This plunged bilateral ties to their lowest point in more than a decade.

In the past two months, both countries have imposed border restrictions on one another. They have each also strengthened troop presence along the border.

Brewing tensions erupted into a deadly battle at the border on Thursday, with Thailand and Cambodia each accusing the other of firing the first shots.

Here's more on how things escalated - and where it could all go from here.

Image source, Getty Images

Several countries have warned against travelling to areas close to the Thai-Cambodian border in light of the ongoing clashes.

The UK’s Foreign, Commonwealth & Development Office specified the Preah Vihear, Ta Moan and Ta Krabey temples among places that have been in dispute between Thailand and Cambodia.

"Take extra care when traveling in this area, and follow the instructions of the local authorities," the office said.

Australia, New Zealand, Singapore and the US have also updated their travel advisories to urge travellers to avoid areas where troops are engaged in armed conflict.

Hong Kong and China have issued amber alerts, the lowest of three levels used for places with "signs of threat".

We are getting more vision from the ground today, including this clip from the Thai Army, showing a drone strike.

The BBC cannot independently verify the footage.

More than 2,000 Cambodians have returned to their home country via the Thai town of Chanthaburi.

Droves of people have crowded up the checkpoint, waiting for their turn to cross over, photographs published by Bangkok Post show. Also seen there are trucks piled high with bags and boxes of belongings.

While Thailand had announced on Thursday it was sealing all borders with Cambodia, the checkpoint at Chanthaburi has been temporarily opened for cross-border movement from 09:00 to 15:00 daily.

Thai authorities have deemed five districts in Thailand's Si Sa Ket and Ubon Ratchathani provinces - up to 40km from its border with Cambodia - as high-risk districts because they fall within the firing ranges of the Cambodian military's rockets.

Cambodia's BM-21 rocket systems have a firing range of 20km, while its Type-90B PHL-81 rocket launches can operate up to a distance of 40km, the Bangkok Post reported.

Thailand has already evacuated more than 130,000 civilians from Si Sa Ket, Ubon Ratchathani and two other provinces to shelters for safety.

We've just heard from Thailand's foreign ministry saying that it is against third-party mediation of its conflict with neighbour Cambodia.

The chairman of the Association of Southeast Asian Nations, Malaysian Prime Minister Anwar Ibrahim, had earlier offered to facilitate talks between the two countries.

The ministry's spokesman Nikorndej Balankura told the Reuters news agency that the situation must be solved through bilateral means, adding that Phnom Penh must stop its offensive moves.

"I don't think we need any mediation from a third country yet," Nikorndej says.

A Thai soldier who lost his right leg during a landmine explosion along the border last week says he is proud to serve his country and "has no regrets".

“I’ve come to terms with it. I understand that loss is part of the risk when serving the country in this role. Don’t worry about me. I’m still alive, Sergeant Major Pichitchai Boonchula told reporters in Thailand.

Pichitchai, who was injured during a border patrol, is now in stable condition. Four other soldiers suffered chest tightness from the shock of the blast.

The explosion led Bangkok to expel Cambodia's ambassador and to recall its own envoy in Phnom Penh.

Image source, Getty Images

Thai authorities have rubbished Cambodia's allegations that its army bombed Preah Vihear Temple, a Unesco World Heritage Site that both countries had laid claim to before an ICC ruling that gave Cambodia sovereignity over it.

"The accusation by the Cambodian side that Preah Vihear Temple was damaged by the Thai attack is a clear distortion of the facts," the Thai army said on Friday.

Cambodia had accused Thailand of causing "significant damage" to the site with its "indiscriminate attacks, involving shelling and aerial bombardment".

Unesco has several conventions in place to prevent damage and destruction to sites it recognises.

"Thailand's aggressive actions not only endanger sites that form part of the shared heritage of humanity, but also reflect a blatant disregard for its international legal obligations," Phnom Penh had said.

Image source, Getty Images

In several strongly-worded posts on social media on Thursday, Thailand's suspended Prime Minister Paetongtarn Shinawatra condemned what she called Cambodia's "act of aggression" along the Thai border.

"The current situation is no longer about diplomacy or negotiation," she said in one of them.

Thailand had earlier "made every effort to engage in diplomatic dialogue", she said, adding that she "fully supports all responsive actions" taken by Thai authorities.

Tensions between Thailand and Cambodia had risen following a clash in May, but it was Paetongtarn's leaked phone conversation with Cambodia's senior leader Hun Sen that led to this sharp deterioration of ties.

In the conversation, Paetongtarn called him "uncle", and criticised one of her own military commanders, sparking public anger.

Many people have faulted Paetongtarn for her conversation with Hun Sen, who appeared to believe that she could resolve their differences by appealing to his long standing friendship with her father, former prime minister Thaksin Shinawatra.

Jang Sawitree
Reporting for BBC near Surin province

Image source, BBC/Lulu Luo

At a sports complex which has been converted into an evacuation centre in Thailand's Surin province, evacuees - many of them children and elderly - said they were still shaken by the rocket and artillery attacks they witnessed on Thursday.

Panic broke out when the firing started and evacuation trucks quickly filled up, said Joi Phasuwan, from the Phanom Dong Rak district.

The 63-year-old, along with her two grandchildren, "waited a long time" before they finally got moved to the evacuation centre. They moved farther this time compared to past evacuations, Joi says.

She plans to send the children to their parents in Bangkok if the situation does not de-escalate, she says.

Nuansri Sorchoke, also 63, said this is her third experience with border clashes.

The first was when she was 19. At the time, she says she joined the fight armed with only a sickle. The second was in 2011, when she had to flee, just like she did this time.

Her husband however did not manage to evacuate, and had to hide in a bunker overnight as both sides exchanged fire, she says.

Image source, Getty Images

Here's what we know has happened so far as as clashes between Thailand and Cambodia enters a second day:

• Thai officials say clashes have taken place in 12 locations along the disputed border, and its Acting Prime Minister Phumtham Wechayachai said the conflict could "move towards war"
• At least 15 people have been killed so far in Thailand since Thursday - all but one of them were civilians
• Cambodia has not released a national casualty toll, but authorities in one province said at least one civilian has been killed
• More than 100,000 civilians have been displaced in Thailand across several border provinces while 1,500 families in Cambodia's Oddar Meanchey province have been evacuated
• Phnom Penh has accused Thailand of using cluster munitions within Cambodian territory
• The United Nations Security Council is expected to meet later today over the conflict

A note that Thai authorities have so far released significantly more updates than the Cambodians. Stay with us as we bring you more information.

Image source, Getty Images

Cambodia has accused Thailand of using banned cluster munitions at a border area within Cambodian territory.

"Thailand is once again resorting to brutal tactics it employed in 2011 during the armed conflict with Cambdoia near Preah Vihear Temple, when it used cluster munitions which resulted in widespread damages and contamination," Phnom Penh said in a statement on Friday.

Thailand had admitted to using cluster bombs in 2011, but has not responded to these specific allegations.

Cluster munitions are banned in much of the world because of their indiscriminate effect on civilian populations.

Jonathan Head
BBC South East Asia Correspondent

Image source, Getty Images

Cambodia and Thailand have a history of occasional conflict.

The two countries share a long and forested border with areas that both sides claim. There have been serious exchanges of fire in the past, too. But these were de-escalated relatively quickly.

Even as recently as in May, after an incident in which a Cambodian soldier was killed, both sides looked keen to prevent more violence.

Then on Thursday, it erupted. Why has this particular border skirmish – which kicked off after five Thai soldiers were injured in a landmine explosion on Wednesday – spread into something so much larger?

Relations between the two countries deteriorated sharply last month, when Cambodia's senior leader Hun Sen deeply embarrassed Thai Prime Minister Paetongtarn Shinawatra by leaking a phone conversation between them about the disputed border.

Read more on how the latest fight has come after the crumbling of an old friendship.

Image source, Getty Images

Fighting at the disputed Thai-Cambodian border entered a second day on Friday, marking a dramatic escalation of the dispute between the two South East Asian neighbours that dates back more than a century.

In Thailand, clashes in the Ubon Ratchathani and Surin provinces on Thursday wounded dozens and displaced more than 100,000 civilians. Some 1,500 families in Cambodia's Oddar Meanchey province have been evacuated, according to officials.

Malaysia's Prime Minister Anwar Ibrahim saying he has appealed to leaders of both countries for an immediate ceasefire.

"I welcome the positive signals and willingness shown by both Bangkok and Phnom Penh to consider this path forward," Anwar, who chairs the Association of South East Asian Nations or Asean, wrote on Facebook.

Despite Anwar's optimism, fighting had not ceased throughout the night.

Australia, China, the European Union and the US have also called for peace.

The United Nations Security Council is expected to meet later on Friday over the conflict.

Intense fighting between Thailand and Cambodia over a disputed border has entered a second day despite calls for a ceasefire from regional and world leaders.

Thailand's acting leader Phumtham Wechayachai has warned that the exchange of fire "could move toward war".

Fifteen people have been killed in Thailand, all but one of whom are civilians. Cambodia has not released a national casualty toll.

Stay with us as we bring you the latest - including updates from our colleagues in areas close to the border.

Jamie Whitehead
Live reporter

At least 12 people – mostly Thai civilians – have been confirmed killed in clashes between Thai and Cambodian troops on the two nations' shared border, marking an escalation of a dispute which goes back over 100 years, and has been simmering for several months.

Artillery and rockets have been fired from Cambodia, and Thailand has deployed fighter jets.

While officials in Bangkok have blamed the attack on Cambodian aggression, Cambodian Prime Minister Hun Manet says Thailand launched a pre-mediated assault.

Nearby countries have called for a de-escalation, with Malaysia’s Prime Minister Anwar Ibrahim saying he would speak to both countries by the end of the day.

We are going to bring our live coverage to a close now, but you can keep up with what’s happening in our news story.