People have rushed to social media to show their support for Paris following a series of fatal terror attacks on the capital.
The hashtags #ViveLaFrance and #PrayforPeace started trending on Twitter shortly after the attacks, while #prayforparis is being used on Instagram.
Famous figures have also been sharing their condolences on social media. Lewis Hamilton tweeted ahead of his qualification for the Brazilian Grand Prix. Rock band the Foo Fighters have cancelled their remaining tour dates. In a posting on their Facebook page, the band said: "This is crazy and it sucks." They were due to play two dates in France on 16th and 17th November.
It is with profound sadness and heartfelt concern for everyone in Paris that we have been forced to announce the cancellation of the rest of our tour. In light of this senseless violence, the closing of borders, and international mourning, we can't continue right now. There is no other way to say it. This is crazy and it sucks. Our thoughts and prayers are with everyone who was hurt or who lost a loved one.
One Direction tweeted a tribute from the four band members and Manchester United shared a photo on the team's Twitter account with the #PrayforParis hashtag.