British Air Force Typhoon fighter aircraft have operated alongside France's air force in a combined operation against an subterranean weapons facility in Syria used by the Islamic State group (IS), according to the UK's MoD.
The site, identified by reconnaissance, was assessed as storing arms and explosives, the statement said, and was located in hills just to the north of the ancient city of Palmyra in central Syria.
"The RAF jets used precision-guided Paveway IV munitions to target a several entry passages leading to the site... preliminary assessments suggest the target was engaged successfully," the ministry announced.
There was no evidence of any civilian casualties in the attack late on Saturday and each participating jet returned to base without incident, the defence officials confirmed.
The Typhoon FGR4s were supported by a Voyager aerial refuelling aircraft.
Daesh - alternatively referred to as ISIS - enforced jihadist rule over parts of Iraq and Syria until 2019.
"This operation shows our UK leadership, and resolve to work closely with allied nations, to eradicate any revival of the terrorist group and their violent and radical beliefs in the area," UK Defence Secretary John Healey stated.
British military aircraft have performed surveillance missions over Syrian airspace to "prevent any attempted resurgence" of the group after its military defeat at the Baghuz confrontation in 2019, the MoD reported.
"I want to thank the personnel of British forces participating in this strike for their expertise and their bravery," Healey added. "Including them were a great many UK service members stationed over the festive period. This operation, to remove militants who threaten our safety, demonstrates how UK forces are always on standby, all year round, ensuring Britain's security within its borders and influential overseas."
During December, the United States armed forces conducted what it described as a "major assault" targeting Daesh sites in the country, following an attack killed two US troops and a local interpreter in the Palmyra area.
The United Nations estimates IS still maintains between 5,000 and 7,000 fighters in Iraq and Syria.
