French warplanes pounded Islamic State's Syrian stronghold in retaliation for a wave of coordinated attacks claimed by the jihadists which left 129 people dead in Paris.
Up to 20,000 people, among them Prime Minister Lars Lokke Rasmussen, gathered for a candlelight vigil at the gates of the French embassy in Copenhagen mourn the victims of the Paris attacks.
The defense ministers of France and the United States agreed on "concrete steps" to intensify cooperation against the Islamic State group, the Pentagon said.
German President Joachim Gauck said the world is confronted with a "new type of war" perpetrated by terrorists bent on killing those who refuse to follow their "barbaric ideology".
Russian President Vladimir Putin and US President Barack Obama shook hands and chatted in a six-second encounter at a summit in Turkey, breaking the ice for the first time since Moscow launched its air campaign in Syria.
Multiple "terror" attacks in Paris increased the pressure on some 20 countries and organisations meeting in Vienna on Saturday to overcome deep divisions and help end Syria's horrific civil war.
Moscow called on Saturday for the international community to unite in its fight against terrorism after a string of attacks in Paris left more than 128 people dead on Friday.
The Paris attacks show it is more vital than ever to coordinate global efforts to fight terrorism, France's foreign minister said, vowing that French "international action" will not stop.
British Prime Minister David Cameron said he was "shocked" after at least 18 people were reported killed in multiple attacks in Paris, including one near the Stade de France sports stadium.
Sirens blaring, blood on the roads, weeping relatives: nightmare scenes played out on the streets of Paris on Friday night as at least 120 people were killed in simultaneous attacks.
Indian Prime Minister Narendra Modi is set to address a huge rally at London'sWembley Stadium and have lunch with Queen Elizabeth II on Friday, the second day of his visit to Britain.
Top EU official Donald Tusk warned it would be "very, very tough" to reach a deal on reforms Prime Minister David Cameron has asked for to help keep Britain in the bloc.
FIFA approved five candidates to stand in February's vote to replace Sepp Blatter as president of world football's governing body, but Michel Platini has not yet made the list.
EU leaders were considering holding a summit with Turkish President Recep Tayyip Erdogan later this month to seek his help in curbing migrant flows to Europe.
The outgoing head of the Catalan government, Artur Mas, failed again to garner enough support in the regional parliament to secure a new term following a September vote.
Prime Minister David Cameron said British and Indian companies will announce deals worth a total of £9.0 billion during his Indian counterpart Narendra Modi's visit to Britain.
The first meeting of the Astana club has gathered over 50 experts in economics, politics, international relationships to discuss the geo-economic situation in the Eurasian regio