G20 to discuss threat of Isis infiltrators among EU migrants after Paris attacks
The leaders of the G20 nations have condemned last Friday's terrorist attacks in Paris and expressed their sorrow for the victims.
The G20 summit opened in Turkey's southern resort of Antalya on Sunday.
After being welcomed by Turkish President Recep Tayyip Erdogan, the leaders held a working lunch.
World leaders have begun meeting in Turkey to discuss the effect of the refugee crisis on European security after terrorist attacks in Paris left 129 dead and several hundred injured.
Islamic State claimed responsibility for a string of coordinated gun attacks and suicide bombings in the French capital on Friday. Seven extremists opened fire on restaurants, bars and a concert hall, and detonated suicide vests near the Stade de France in the deadliest attack on European soil in more than a decade.
The French president, François Hollande, is the only major political figure absent from the G20 summit on Sunday as he oversees the heightened security operations in Paris. He is also expected to take part in the three days of official mourning.
In his absence, the G20 have started to discuss the threat of Isis infiltrators among EU migrants and refugees, an issue that was thrown into the spotlight on Saturday after it emerged at least one the attackers was found with a Syrian passport flagged as arriving in Greece on a typical refugee route. It has not been confirmed whether the passport is genuine.