British Air Force Typhoon FGR4s have joined forces with French warplanes in a joint strike targeting an underground arms cache in Syria operated by the Daesh militant organization, according to the UK's MoD.
The site, located using intelligence, was thought to be containing munitions and bombs, the announcement noted, and was situated in mountainous terrain just to the north of Palmyra in the heart of Syria.
"Our aircraft employed laser-guided Paveway IV weapons to target a series of approach shafts down to the site... initial indications indicate the objective was successfully hit," the MoD said.
There was no indication of any civilian impact in the operation late on Saturday and all the aircraft made a safe return, the MoD added.
The Typhoon fighters were assisted by a Voyager tanker plane.
Daesh - referred to as Daesh - imposed jihadist rule over large swathes of both Syria and Iraq before its territorial defeat in 2019.
"This strike demonstrates the UK's leading role, and resolve to operate in unison with our allies, to eradicate any revival of IS and their violent and radical beliefs in the region," the British Defence Secretary the minister said.
RAF aircraft have performed overwatch operations over Syria to "forestall any efforts to regroup" of IS after its routing at the Baghuz confrontation in 2019, the ministry said.
"I must thank every member of our armed forces participating in this strike for their expertise and their courage," he said. "They were among thousands of British troops deployed over the holidays. This operation, to eliminate militants who threaten our safety, demonstrates how British military are prepared to act, continuously, ensuring Britain's security domestically and influential overseas."
Last December, the American forces executed what it described as a "major assault" targeting IS targets in the country, subsequent to an ambush resulted in the deaths of two American soldiers and a civilian interpreter in Palmyra.
The U.N. says Daesh still has an estimated 5,000 to 7,000 combatants in Iraq and Syria.
