NATO countries have agreed to help the United States tackle Islamic State militants in Iraq and Syria.

The agreement came at a summit in Wales, as the US continues air strikes over ISIS strongholds in Iraq.

"Key NATO allies stand ready to confront this terrorist threat through military, intelligence and law enforcement as well as diplomatic efforts."

Meanwhile the US has confirmed it's killed the leader of Shebab militants in Somalia.

The White House says he died in a drone strike on a gathering of Shebab commanders, using Hellfire missiles and laser-guided bombs.