Billionaire Republican presidential hopeful Donald Trump said that the United States should "strongly consider" shuttering some mosques.
President Francois Hollande said France would step up the battle against the Islamic State (IS) group in Syria in the wake of Paris attacks he dubbed "acts of war".
CIA director John Brennan warned that the attacks in Paris were likely not a "one off event" and that he expects the Islamic State group has more operations in the pipeline.
Blasts shook the Islamic State group's Syrian stronghold Raqa as French air strikes hit weapons depots and a training camp in response to the attacks in Paris.
British security services have foiled around seven terror attacks since June with fighters returning from Syria posing a growing threat.
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 5,000 people marched in silence Sunday in Montreal in memory of victims of the Paris terror attacks.
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".
The Islamic State jihadist group claimed gun and bomb attacks that left more than 120 people dead in Paris in a statement posted online.
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.
French President Francois Hollande paid tribute to Helmut Schmidtas a "great European" after the former West German chancellor died at the age of 96.
France wants an "operational integration" between Renault and Nissan, Economy Minister Emmanuel Macron said, but reaffirmed that a merger is "not on the agenda".
Kazakh National Holding Baiterek has signed an agreement with Peugeot Citroën to set up full-cycle assembly of cars in Kostanay, Kazakhstan.
French President Francois Hollande called for the creation of an "environmental security council" to verify and enforce measures to be adopted at a year-end UN climate summit.
- Great Britain
- emergency situations