World leaders welcomed at the G20 Antalya Summit in Turkey

World leaders gathered on Sunday to denounce terrorism at the heavily-guarded G20 Summit in Turkey after the gun and bomb assaults in Paris, despite divisions over conflict-riven Syria.

World leaders welcomed at the G20 Antalya Summit in Turkey

The leaders of the world's 20 most powerful countries have agreed to step up border controls and aviation security in the wake of the Paris attacks that killed 129 people, according to a draft statement seen by Reuters on Sunday.

World leaders welcomed at the G20 Antalya Summit in Turkey

The heads of the Group of 20 (G20) largest economies, meeting in Turkey, condemned the attacks claimed by ISIS as "heinous" and said they remained united in fighting terrorism, according to the draft document.

World leaders welcomed at the G20 Antalya Summit in Turkey

The finalized document is due to be released later on Sunday. US President Barack Obama, Vladimir Putin of Russia, China's President Xi Jinping and other leaders gathered at the Mediterranean resort of Antalya two days after the Paris attacks claimed by ISIS terrorists.

World leaders welcomed at the G20 Antalya Summit in Turkey

Obama condemned the killing of 129 people in Paris as well as a double suicide bombing in Ankara last month as attacks "on the civilized world" and vowed to "redouble our efforts" to eliminate the ISIS network.

World leaders welcomed at the G20 Antalya Summit in Turkey

"We stand in solidarity with France in hunting down the perpetrators of this crime and bringing them to justice," Obama declared after talks with his host, President Recep Tayyip Erdogan.

World leaders welcomed at the G20 Antalya Summit in Turkey

The Paris killings darkened the mood of the summit of the Group of 20 top world economies, with security and the Syrian conflict now eclipsing an economic agenda that will also deal with the spreading refugee crisis, climate change and tax avoidance.

World leaders welcomed at the G20 Antalya Summit in Turkey

Erdoğan said the summit agenda was now "very different" given the massacre in Paris, with the leaders to condemn the attacks in their communique or a separate statement.

World leaders welcomed at the G20 Antalya Summit in Turkey

"I believe that our stance against international terrorism will find its expression in a very strong, tough message at the G20 summit," Erdoğan said.

World leaders welcomed at the G20 Antalya Summit in Turkey

"This terrorist action is not only against French people but all humanity."

World leaders welcomed at the G20 Antalya Summit in Turkey

Russia's Putin said that overcoming global terror was possible only "if all the international community unites its efforts". Putin is key to the gathering, which is taking place without French leader Francois Hollande who remains home to lead his shaken country in the aftermath of the attacks.

World leaders welcomed at the G20 Antalya Summit in Turkey

Russia launched its own Syrian air campaign in September but the West suspects the Russian bombardment is aimed at propping up the regime of President Bashar al-Assad, a difference that risks driving a wedge through the summit.

World leaders welcomed at the G20 Antalya Summit in Turkey

European Union President Donald Tusk told reporters that Russian actions in Syria must be focused on ISIS and not the anti-Assad opposition.

World leaders welcomed at the G20 Antalya Summit in Turkey

The summit offers the possibility of the first encounter between Obama and Putin since Russia launched its Syrian air campaign, although the White House said no formal summit is so far scheduled.

World leaders welcomed at the G20 Antalya Summit in Turkey

Their icy body language at previous encounters has grabbed as many headlines as their comments.

Daily Sabah

Daily Sabah

World leaders welcomed at the G20 Antalya Summit in Turkey

World leaders welcomed at the G20 Antalya Summit in Turkey

World leaders welcomed at the G20 Antalya Summit in Turkey

World leaders welcomed at the G20 Antalya Summit in Turkey

World leaders welcomed at the G20 Antalya Summit in Turkey

World leaders welcomed at the G20 Antalya Summit in Turkey

World leaders welcomed at the G20 Antalya Summit in Turkey

World leaders welcomed at the G20 Antalya Summit in Turkey

World leaders welcomed at the G20 Antalya Summit in Turkey

World leaders welcomed at the G20 Antalya Summit in Turkey

World leaders welcomed at the G20 Antalya Summit in Turkey

World leaders welcomed at the G20 Antalya Summit in Turkey

World leaders welcomed at the G20 Antalya Summit in Turkey

World leaders welcomed at the G20 Antalya Summit in Turkey

World leaders welcomed at the G20 Antalya Summit in Turkey

World leaders welcomed at the G20 Antalya Summit in Turkey