Iranian President Hassan Rouhani called Wednesday on the Muslim world to unite and punish the Saudi government.
An angry debate over a ban on burkinis in France was further stoked by images of a veiled woman surrounded by police on a beach in Nice.
Russian warplanes on Tuesday flew a bombing run from an Iranian airstrip against jihadist groups in war-torn Syria.
Not all jihadists are psychopaths, and not all psychopaths turn violent.
Militants inspired by the Islamic State group's ideology are seeking to benefit from the desperation of young Palestinians to strengthen their foothold in the Gaza Strip.
Saudi Arabia has stripped its frequently criticised religious police of their powers to arrest, urging them to act "kindly and gently" in enforcing Islamic rules.
Prime Minister Manuel Valls said extreme forms of Islam were winning the propaganda war for hearts and minds.
Saudi authorities have arrested nine American citizens and one Kazakhstani among 33 'terror' suspects.
French President Francois Hollande will hold talks with Russian leader Vladimir Putin, as part of his diplomatic marathon to forge a broader coalition against Islamic State jihadists in the wake of the Paris attacks.
France's leading Muslim body said it would create a permit to preach for imams in a bid to root out extremists, as well as a new religious body to fight back against jihadist propaganda.
Hillary Clinton called for a US-led global fight to defeat the Islamic State group and shut down its flow of fighters, propaganda and weapons in the wake of the Paris attacks.
Canada's freshly elected Prime Minister Justin Trudeau vowed to remain a "strong" partner in the fight against the Islamic State group.
Britain should "think again" about taking part in air strikes on Islamic Statejihadists in Syria, Defence Secretary Michael Fallon said, after attacks in Paris that left at least 129 people dead.
Billionaire Republican presidential hopeful Donald Trump said that the United States should "strongly consider" shuttering some mosques.
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.
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.
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.
From a quiet, football loving child to an Islamic State executioner, the man who became one of the most haunting figures of the jihadist movement remains a mystery even after being the high-profile target of a US air strike.
Thousands of people protested against migrants in towns around the Czech Republic, a week after the UN slammed the country's treatment of new arrivals as "degrading".