The United States and France will intensify air strikes against the "Islamic State" terrorist group and support those fighting it on the ground in Syria and Iraq, France's President Francois Hollande said Tuesday, according to AFP.

Calling for an "implacable" joint response after meeting with US President Barack Obama, Hollande said the two countries would "scale up our strikes both in Syria and in Iraq to broaden our scope to strengthen our intelligence sharing regarding the targets."