France and Russia agreed to exchange intelligence on militant groups in Syria, but tensions between Russia and Turkey showed little sign of easing.
Around 1,000 people attended a national memorial service in the centre of Paris held in tribute to the victims of the terror attacks.
CNBC's Geoff Cutmore reports from Russia about Russian President Vladimir Putin's frustration with western allies caused by the destruction of a Russian military jet.
CNBC's Hadley Gamble reports that Turkey's president, Recep Erdoğan, criticized Russian complaints about the shooting down of a Russian jet as emotional and unfitting.
Alex Krasodomski-Jones, researcher in the centere for the analysis of social media at Demos, explains the methods used by ISIS to evade online surveillance.
CNBC's Geoff Cutmore reports from Russia that President Vladimir Putin does not face the same opposition to military action in Syria as political leaders in other countries, such as in the U.K.
CNBC's Geoff Cutmore reports from Russia about President Vladimir Putin's anger over the shooting down of a Russian jet by Turkey.
CNBC's Julia Chatterley reports from Brussels where Belgian security services are continuing to conduct raids on suspected terrorists in the city.
CNBC's Hadley Gamble reports from Turkey that, despite conciliatory tones from Turkish President Recep Erdoğan, he still has not apologized for shooting down a Russian military jet.
Russia will keep cooperating with the United States and its partners to fight Islamic State in Syria, Russia's Vladimir Putin said.
China will shake up its military by establishing a joint operational command structure and rejig existing military regions as part of overall reforms.
Tom Switzer, U.S. Studies Center research associate at the University of Sydney, says there are serious limits to how much a U.S.-led coalition can bring positive change in Syria.
German police commando units arrested two people in Berlin on Thursday who are suspected of planning an attack, a police spokesman said.
Vadim Nikitin, senior associate at Stroz Friedberg, talks about how Russian president Vladimir Putin is dealing with the situation in Syria and the escalating tensions with Turkey.
Russia’s President Putin is meeting his French opposite number Hollande Thursday evening, as France seems keener to bring Russia in from the cold.
Russia may trade an end of EU sanctions with cooperation on Syria, says Tina Burrett, assistant professor of political science at Sophia University.
Brussels has reopened after a four-day security lockdown but the hunt went on for militants police fear may mount a Paris-style attack.
Russia sent an advanced missile system to Syria to protect its jets and pledged its air force would keep flying missions near Turkish air space.
France was hoping to build a broad coalition against ISIS, but talks have been complicated by the Russia-Turkey jet incident that's forced countries to take sides, says Lauren Goodrich, senior Eurasia analyst at Stratfor.
Brian Jenkins, senior adviser at RAND, says the countries will not go to war over Turkey's downing of a Russian jet, but there will be repercussions.