British Air Force Typhoon fighter aircraft have conducted a mission with French aircraft in a joint strike against an subterranean weapons facility in Syria operated by the IS group, according to the UK Ministry of Defence.
The site, located using reconnaissance, was believed to be storing arms and explosives, the release indicated, and was situated in mountainous terrain just north of the ancient city of Palmyra in the heart of Syria.
"The RAF jets employed precision-guided Paveway IV munitions to strike a several approach shafts providing entry to the site... preliminary assessments are that the objective was successfully hit," the MoD said.
There was no indication of any civilian impact in the operation conducted Saturday night and each participating jet made a safe return, the ministry further stated.
The British jets were supported by a Voyager refuelling tanker.
IS - referred to as the so-called Islamic State - imposed extremist governance over significant areas in Syria and Iraq before its territorial defeat in 2019.
"This action underscores our UK leadership, and determination to stand shoulder to shoulder with our allies, to eliminate any resurgence of Daesh and their violent and radical beliefs in the region," UK Defence Secretary John Healey said.
RAF aircraft have carried out patrols over Syrian airspace to "prevent any efforts to regroup" of the group after its military defeat at the climactic battle in Baghuz in the year 2019, the authorities noted.
"I must thank every member of British forces who took part in this mission for their professionalism and their courage," he added. "They were among numerous British troops deployed over Christmas and New Year. This mission, to remove terrorist threats who threaten our security, demonstrates how British military are always on standby, all year round, protecting the UK domestically and strong abroad."
During December, the United States armed forces executed what it called a "massive strike" on Daesh sites in the country, subsequent to an attack killed two US troops and a civilian interpreter in Palmyra.
The United Nations estimates Islamic State still has an estimated 5,000 to 7,000 combatants in both countries.
