People in Nice are using social media to try and find people who are missing. 

One widely shared story comes from a Facebook user named Tiava Banner, who wrote: "We've lost our 8-month-old baby. Friends in Nice, if you've seen him, if you were there, if you've picked him up please contact me."

The post was later updated to say the baby had been found, and thanked a woman named Joy Ruez. 

"Thank you Facebook to all those who helped and sent messages of support," Tiava Banner wrote, also adding hashtags associated with the Nice attacks. 

The BBC has not been able to independently verify this story, but its spread shows perhaps how much people want to hear of a happy ending in the midst of the tragedy.

Image source, Tiava Banner

Some of the latest images from the French city of Nice after a lorry ploughed into a crowd celebrating Bastille Day, killing at least 80 people.

This image, from slightly further back, shows the lorry in the middle of other vehicles and being inspected by police.

Officials say it ploughed through the crowds watching fireworks on the promenade for 2km (1.2 miles). 

Image source, AP

This image shows the lorry which was used in the attack, with bullet holes marking the front window after police opened fire. 

The driver of the lorry was killed. Police are investigating whether he was acting alone.

Image source, AP

The police in Orlando, a city which recently witnessed its own awful attack, have tweeted their sympathies to France. 

British tourist Kevin Harris told the BBC what he could see from his hotel in Nice. 

"I heard a lot of screaming and shouting. I came out onto my terrace and in front of me I could see lots of what appeared to be bodies lying on the road just outside of where I'm sitting now.

"The bodies are still there, covered in white sheets. And the scene is still carrying on, these poor people are lying on the road in front of us, they're lying on there and there's lots of police obviously around and ambulances, but it's a terrible, terrible scene."

Donald Tusk, president of the European Council, tweeted this earlier: 

German Chancellor Angela Merkel and French Foreign Minister Jean-Marc Ayrault are among those seen here observing a moment of silence for the victims, at the beginning of the Asia-Europe Meeting (ASEM) Summit in Ulan Bator, Mongolia.

Image source, EPA

French President Francois Hollande spoke at a news conference earlier. 

French Interior Minister Bernard Cazeneuve spoke to reporters about the attack, saying the death toll stood at 80 people with scores injured. Eighteen people are in critical condition he said.

Image source, AFP

One word dominates the headlines in the French press on Friday morning: "Horror."

Le Soir, Le Figaro and Le Parisien all use the word to describe the attack, alongside pictures of the emergency services in its aftermath. 

Le Figaro makes reference to the fact that this attack is by no means the only tragedy France has suffered recently - its headline reads: "Horror, again." 

Image source, Various

Supporters of the so-called Islamic State (IS) group have been widely cheering the attack online, says Mina Al-Lam, who analyses jihadist media activity for BBC Monitoring.

IS itself has not claimed any link with the incident.

But such a level of what appears to be co-ordinated online activism in the immediate aftermath of incidents usually signals an imminent IS claim of responsibility, she says. 

French PM Manuel Valls tweets: "The city of Nice was attacked by terrorism on its national day. Immense pain, the country is in mourning. The French will endure."

The British foreign office advises people in France: 

The British ambassador to France has tweeted:

French Interior Minister Bernard Cazeneuve has said 80 people are now known to have died and 18 people are in a critical condition.

Before the attack, in a piece to mark Bastille Day, the BBC's Lucy Williamson in Paris asked what the values of liberty, equality and fraternity mean in modern day France.

"In the midst of new debates brought by globalisation and the growth of multicultural identities here, the motto is seen as a refuge by many French people - a way to capture unity despite the nation's differences and divisions, in the way the French football team posed as a national emblem of its modern, multi-ethnic society.

"But modern life has also changed what freedom, brotherhood and equality mean to people here," she said.

President Francois Hollande had said only hours ago that the state of emergency, put in place after the terror attacks in November, would not be extended beyond its existing 26 July end date.

It had twice been extended, to cover the Euro 2016 soccer tournament and the end of the Tour de France cycling race.

But now, Mr Hollande has said he wants to add another three months. 

Alban Mikoczy, external tweeted a picture he said was of the Negresco Hotel in Nice, turned into a makeshift hospital.