French President Francois Hollande and British Prime Minister David Cameron have agreed to "intensify their cooperation" in the fight against ISIS militants, Hollande's office said in a statement Saturday.

The two leaders spoke by phone, with Hollande congratulating Cameron on winning a recent vote in the British parliament to start bombing ISIS targets in Syria, the French presidency said.

"The two leaders agreed to further intensify their cooperation in the fight against Daesh (ISIS) both in the Syrian campaign and in the exchange of information," the Elysee Palace said.

Britain, which was already carrying out anti-ISIS air strikes in Iraq, attacked jihadist targets in Syria for the first time on Thursday, just hours after parliament gave its approval.