British and French warplanes carried out a joint airstrike on an underground facility used by Islamic State militants to store weapons and explosives in central Syria, the U.K. Ministry of Defence said.

The strike occurred Saturday night in a mountainous area north of Palmyra, with RAF Typhoon jets and French aircraft targeting access tunnels using precision-guided bombs.

Initial assessments indicate the site was successfully hit, though evaluations are ongoing.

The operation highlights continued cooperation between Britain, France, and the U.S.-led coalition to prevent an ISIS resurgence, Fox News has reported.

It comes amid intensified U.S. counterterrorism operations in Syria, as ISIS remains an active threat despite sustained military pressure.