RAF Typhoon fighter aircraft have operated alongside French warplanes in a combined operation on an underground arms cache in Syrian territory employed by the Daesh militant organization, as stated by the UK Ministry of Defence.
The site, identified by surveillance, was assessed as housing weapons and explosive materials, the statement said, and was located in hills just to the north of Palmyra in the heart of Syria.
"Our aircraft employed Paveway IV guided bombs to strike a series of approach shafts providing entry to the site... early reports are that the objective was successfully hit," the ministry announced.
There was no evidence of any civilian casualties in the strike on Saturday evening and each participating jet returned safely, the ministry further stated.
The Typhoon fighters were assisted by a Voyager tanker plane.
Daesh - also known as ISIS - enforced jihadist rule over large swathes of both Syria and Iraq before its territorial defeat in 2019.
"This operation underscores our UK leadership, and resolve to operate in unison with our allies, to eliminate any revival of the terrorist group and their violent and radical beliefs in the area," Britain's Defence Chief John Healey remarked.
British military aircraft have carried out overwatch operations over Syrian airspace to "prevent any attempted comeback" of Islamic State following its military defeat at the battle of Baghuz in 2019, the ministry said.
"I must thank every member of British forces who took part in this mission for their professionalism and their bravery," Healey said. "They were among a great many UK service members deployed over the festive period. This mission, to eliminate dangerous terrorists who endanger our security, demonstrates how British military are prepared to act, all year round, ensuring Britain's security domestically and powerful internationally."
Last December, the US military carried out what it described as a "major assault" targeting Islamic State objectives in Syria, following an ambush claimed the lives of two American soldiers and a local interpreter in Palmyra.
The U.N. says Islamic State still maintains roughly 5-7 thousand militants in Iraq and Syria.
