Mourners across the globe reacted to the attacks in Paris with tears, shows of solidarity and condemnations of those who carried out the series of bloody assaults.
Among politicians, there were loud calls for the world to ratchet up the fight against terrorism.
Bouquets, candles and messages of condolence were laid at French embassies worldwide. Buildings ranging from the Sydney Opera House in Australia to One World Trade Center in New York were lit up in the colours of the French flag.
In Madrid and Barcelona, hundreds stood for a minute's silence outside city hall.
"We are reminded in this time of tragedy that the bonds of liberte, egalite, fraternite, are not just the values French people share, but we share," said US President Barack Obama, citing France's national motto.
The coordinated killings reverberated around the world after the shootings by gunmen shouting "Allahu akbar", explosions and a hostage-taking at a popular concert venue on Friday in the French capital.
French President Francois Hollande received calls from world leaders including Egypt's President Abdel Fattah al-Sisi and Recep Tayyip Erdogan of Turkey.
Queen Elizabeth II said she and her spouse Prince Philip were "deeply shocked," and British Prime Minister David Cameron offered Britain's help.
Indian Premier Narendra Modi called the attacks "anguishing and dreadful" and Hassan Rouhani of Iran condemned the attacks as "crimes against humanity."
"We share the sadness and the pain of the French people," said Russian Prime Minister Dmitry Medvedev. "The Paris tragedy requires of us all to unite in the fight against extremism."
Chinese President Xi Jinping said: "In these tragic times for the French people, I want... to condemn in the strongest ways this barbarous act."
The Islamic State group claimed responsibility for a "blessed attack on... Crusader France," which included an assault on the national sports stadium and the Bataclan concert hall.
France is part of a US-led coalition conducting an air war against IS in Syria and Iraq, where IS declared a caliphate last year after seizing swathes of both countries.
Syrian President Bashar al-Assad said that French policy had contributed to the "spread of terrorism" that culminated in the Paris attacks.
"The terrorist attacks that targeted the French capital Paris cannot be separated from what happened in the Lebanese capital Beirut lately and from what has been happening in Syria for the past five years and in other areas," he said.
- 'We are all France' -
The outpouring of support for France generated massive amounts of posts on social media, with the hashtags #prayforparis and #jesuisparis going viral.
One user, @emilymiddlemas_ , wrote "I am so heart broken! All my love and prayers go out to everyone affected by this horrible attack, when will this stop."
Mourners were also sharing a peace symbol that includes Paris's iconic Eiffel Tower.
Among other reactions:
- Pope Francis expressed his profound distress and solidarity with the casualties. "There cannot be justification, religious or human" for the attacks, he said.
- Spanish Premier Mariano Rajoy declared, "We are all France," apparently echoing France's support for the United States ("We are all Americans") after 9/11.
- Nigerian President Muhammadu Buhari hit out at "barbaric attacks... an unacceptable affront to all human values and civilized norms."
- Kenyan President Uhuru Kenyatta: "Our common humanity has been attacked in Paris by terrorists, and innocent civilians murdered in cold blood."
- "This planned horror is a real crime against humanity.": Algerian President Abdelaziz Bouteflika
- Petro Poroshenko, Ukraine's president: "Terrorism is our common enemy."
- The grand imam of the prestigious Al-Azhar mosque in Cairo called the attacks "despicable" adding "it is time for the whole world to confront this monster."
- Israeli Prime Minister Benjamin Netanyahu: "Israel stands shoulder to shoulder with French President Francois Hollande and with the people of France in our common battle against terrorism."
- Greek Prime Minister Alexis Tsipras said: "The terrorists will defeat us...if they force us to abandon our values, and lead us to a fortified Europe inhabited by fearful peoples."
- "Our hearts go out to all the victims and their families across the city tonight.": Irish rock band U2