French President Francois Hollande and British Prime Minister David Cameron have agreed to “intensify their cooperation” in the fight against Islamic State (ISIS) jihadists, 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, according to AFP.

“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.

France began intensifying its air strikes against ISIS in Syria in late November, two days after the group carried out the deadly attacks in Paris, in which 130 people were killed.

Britain was already carrying out anti-ISIS air strikes in Iraq but had not joined the air strikes in Syria until Thursday, just hours after parliament gave its approval, a vote which was a victory for Cameron, who suffered an embarrassing defeat in parliament in 2013 when MPs voted against British military action against the Assad regime in Syria.

Britain’s change of policy with regards to air strikes in Syria came following the Paris attacks, and after Cameron told lawmakers that Britain shouldn’t wait until an attack on its territory to take action against ISIS.

News of the cooperation between Britain and France came hours before a man carried out a stabbing attack at the London underground, injuring three people while saying he was carrying out the attack “for Syria”.