British Air Force Typhoon jets have operated alongside French warplanes in a coordinated attack on an subterranean weapons facility in Syria operated by the IS group, per a report from the UK's MoD.
The site, identified by surveillance, was assessed as housing weapons and explosive materials, the statement said, and was situated in mountains just to the north of Palmyra in Syria's central region.
"Our fighter planes used precision-guided Paveway IV munitions to strike a number of entry passages down to the site... initial indications suggest the objective was successfully hit," the ministry announced.
There was no sign of any civilian casualties in the operation conducted Saturday night and every plane involved made a safe return, the MoD added.
The British jets were assisted by a Voyager aerial refuelling aircraft.
The Islamic State group - also known as the so-called Islamic State - imposed militant control over parts of Syria and Iraq before its territorial defeat in 2019.
"This strike shows British leadership, and resolve to stand shoulder to shoulder with our allies, to stamp out any resurgence of IS and their dangerous and violent ideologies in the area," Britain's Defence Chief John Healey remarked.
British military aircraft have performed overwatch operations over Syrian airspace to "deter any attempted resurgence" of the group following its military defeat at the Baghuz confrontation in 2019, the authorities noted.
"I extend gratitude to all the members of the UK armed forces involved in this mission for their expertise and their valour," he added. "They were among a great many UK service members deployed over the festive period. This mission, to remove terrorist threats who threaten our way of life, shows how UK forces are prepared to act, throughout the year, keeping Britain secure at home and powerful internationally."
During December, the American forces executed what it described as a "major assault" on Islamic State objectives in the country, following an assault resulted in the deaths of two American soldiers and a local interpreter in the Palmyra area.
The U.N. estimates Daesh still maintains roughly 5-7 thousand militants in Syria and Iraq.
