129 people were killed and 352 injured in Friday's attacks
'Three co-ordinated teams' appear to have been behind attacks
Bataclan attacker 'was Frenchman known to police'
Stade de France attackers 'had Egyptian and Syrian passports'
French interior minister gives local authorities right to impose curfews
One Briton is confirmed to have been killed
Islamic State claims responsibility for attacks in official statement
All times in GMT
The North Terminal at London Gatwick Airport has been evacuated.
Sussex Police told the BBC they are dealing with a suspicious package.
Connor Gillies, a Capital FM news reporter, tweeted a picture showing people making their way outside the terminal.
The Kremlin press service has published the text of a telegram sent by President Putin to Francois Hollande earlier today.
"I would like to express my deepest condolences to you personally and all the people of France in connection with the death of a large number of civilians as a result of an unprecedented series of terrorist attacks in Paris," Mr Putin wrote.
"This tragedy became another evidence of barbaric nature of terrorism which poses a challenge to human civilization. It is obvious that effective fight against this evil requires a real combined effort of the entire international community.
"I would like to confirm that the Russian side is ready for the closest possible cooperation with French partners in the investigation of this crime committed in Paris. I expect that its paymasters and perpetrators will be punished."
Mr Putin's ally Bashar al-Assad, the president of Syria, has also made a statement on the attacks, taking the opportunity to make his own case in the process.
"What France suffered from savage terror is what the Syrian people have been enduring for over five years," he was quoted as saying by Syrian state media.
In London, the Lord Mayor's Show will go ahead as planned "in solidarity with Paris", with the Lord Mayor leading a two minute silence from the balcony at The Mansion House at 11:00 GMT, the City of London Corporation says.
Union flags will be flying at half-mast at Guildhall, The Mansion House and Old Bailey, and Tower Bridge will be lit in the colours of the Tricolor from sundown tonight.
Dave Lee, the BBC's North America technology reporter, has written about the role of social media in situations like the one unfolding in Paris.
Quote MessageIt may seem trivial to even care about social media during moments like this - in happier moments it can seem like a place for selfies, holiday photos and banal arguments in 140 characters. But during a crisis social media becomes the single most significant platform for news to be spread, eyewitness experiences to be shared and official statements to be made. And inevitably, these same channels amplify misinformation, allowing rash judgements and prejudices to boil to the surface, fuelling fear and ignorance.
Read the full piece here: #Paris: The power, the horror, and the distortions
German authorities have made arrests in Bavaria, BBC Europe Editor Katya Adler reports.
Francois Hollande has said the Islamic State is behind the attack in Paris, which he called an "act of war".
Mr Hollande said the attacks had been planned and organised from abroad with help from inside France.
He also declared three days of national mourning.
There are reports on Twitter that the media arm of the Islamic State group - the Al-Hayat Media Centre - has claimed responsibility for the attack.
The BBC Monitoring team has looked into the reports and has this:
Quote MessageWestern journalists on Twitter in the past hour have reported that IS published a claim through the Al-Hayat Media Center. Initial research suggests these reports possibly are based on IS supporters reposting a November 2014 French-language Al-Hayat Media Center video and tagging it with hashtags associated with the Paris attack. We have not yet seen a claim of responsibility.
BBC Monitoring
The military is once again a very visible presence on the streets of Paris, after a deployment earlier this year following the Charlie Hebdo attacks.
An additional 1,500 troops have been stationed around the city to protect sensitive sites.
Image source, APSoldiers outside the National Assembly building
Image source, AFPOutside Notre Dame cathedral
Paris hospitals are in need of blood donations. The website, external of the city's blood donation service Don Du Sang appears to have crashed.
Images shared on social media show Parisians queuing up at hospitals to donate.
Italy is adopting heightened security measures following the attacks in Paris, Prime Minister Matteo Renzi said.
In a television address, Mr Renzi said the attacks were against "all of humanity" and against "our way of life".
He has convened a meeting of Italy's national security council to discuss the threat.
Iranian President Hassan Rouhani had been expected to arrive in Rome on Saturday and fly onto Paris on Sunday, but cancelled his visit following the attacks.
British Airways is still flying into Paris but has warned travellers to expect delays due to extra security checks at French airports.
BA says passengers who do not wish to travel to Paris will be able to delay their flight to another day in the next two weeks or re-book to an alternative destination.
You can check information about your flight here, external.
Police forensics teams have begun working at several of the shooting locations.
Image source, AFPPolice forensic experts on Rue du Faubourg du Temple
Image source, EPAAnd at the Cafe Comptoir Voltaire
French prosecutors have a provisional death toll of 128 with another 99 in critical condition, Reuters reports.
Angela Merkel has added to her earlier statement, saying the attackers in Paris "hate freedom".
Speaking to reporters in Berlin, the German chancellor said the victims "wanted to live the life of free people in a city that celebrates freedom", and called the gunmen "murderers who hate precisely this life of freedom".
Germany has offered its counter-terrorism resources to France to aid the investigation.
The attack "was aimed not just at Paris, it targeted and it hits all of us," she added.
Daniel Psenny, a journalist from French newspaper Le Monde, has posted dramatic video footage of people escaping from the Bataclan concert hall while gunfire rings out in the background.
Psenny, whose apartment overlooks one of the building's emergency exits, filmed concertgoers climbing out of windows to escape. Many are screaming as they run, some are clearly wounded and others dead.
Warning: the footage is graphic
You can watch it here, external.
Further closures and cancellations in Paris: Disneyland will shut its gates for the day on Saturday. The theme park said in a statement:
Quote MessageIn light of the recent tragic events in France and in support of our community and the victims of these horrendous attacks, Disneyland Paris has decided not to open its theme parks on Saturday 14 November. Our thoughts and prayers go out to all of those affected by these horrible events.
Disneyland Paris
The government has also cancelled all sporting events in the city this weekend.
Francois Hollande is currently holding an emergency security meeting with ministers and military chiefs.
An additional 1,500 soldiers have been mobilised to guard Paris's parliament buildings, religious sites, and tourist attractions. Schools and universities, many of which normally open on Saturdays, have been closed as part of emergency security measures across the city.
The government has also reimposed border controls that were abandoned as part of Europe's free-travel zone. Border and customs officers will check people, baggage and vehicles entering and leaving France by road, train, sea or plane, said customs official Melanie Lacuire.
French authorities have asked people to remain at home for the time being, while some uncertainty remains over whether all of the attackers were killed. People appear to be returning to the streets, however.
Peter Neumann, Professor of Security Studies at King's College London, spoke to BBC Radio 4's Today programme about the effect of terror attacks on societies.
Quote MessageThis is the attack everybody has been dreading for at least a couple of years. This is really important because it is the essence of terrorism, it is not only about people being killed it is about creating a political effect. What worries me the most is that we will see in France and other European countries a polarisation, with different extremists egging each other on. People on the far right trying to take advantage. It's about dividing societies. This was a big attack but even relatively small attacks are dangerous because of the political situation, because of the chain reaction they can cause.
Peter Neumann, Professor of Security Studies, King's College London
Moving footage has emerged showing Parisians singing the French national anthem as they are evacuated from the Stade de France.
It is not yet known how many people died at the stadium, where two bombs were detonated during a friendly between France and Germany.
Click on the link in the tweet below for the video.
Flowers have been laid at French embassies around the world in memory of those who died in Paris.
Image source, EPAA woman lays flowers at the French embassy in Moscow
Image source, EPAFlowers are laid at the French embassy in Berlin
Image source, ReutersA man walks past flowers at the French embassy in Tokyo