UN Security Council adopts binding resolution against IS

US President Barack Obama on Wednesday led the UN Security Council in unanimously approving a binding resolution on stemming the flow of foreign fighters to Iraq and Syria.

The resolution requires all countries to adopt laws that would make it a serious crime for their nationals to join groups such as Islamic State (IS) and Al-Nusra Front.

Obama described the resolution as "historic" at the special session of the Council, only the sixth time in UN history that the council was convening at the level of heads of state.

The US president opened the session by voicing solidarity with France after one of its citizens was kidnapped and beheaded by militants in Algeria linked to IS.

"We stand with you and the French people as you grieve this terrible loss and as you stand up against terror in defense of liberty," Obama said, turning his gaze towards French President Francois Hollande.

The resolution states that "nations must prevent the movement of terrorist or terrorist groups through their territory and ensure that domestic laws allow for prosecution of those who attempt to do so," he said. 

About 15,000 foreign fighters from 80 countries have joined the ranks of militants in Syria, according to US intelligence estimates.

The resolution falls under Chapter 7 of the UN charter, which means the measures could be enforced by economic sanctions or military force.

Obama appealed to countries to join the US-led coalition against IS during an address a few hours earlier to the UN General Assembly.

The US military operation in Syria was supported by Saudi Arabia, Bahrain, the United Arab Emirates, Qatar and Jordan, prompting Obama to proclaim that the campaign against IS fighters was "not America's fight alone."