British Air Force Typhoon jets have operated alongside French warplanes in a coordinated attack on an subterranean weapons facility in Syria employed by the Daesh militant organization, as stated by the UK's MoD.
The site, identified by reconnaissance, was thought to be containing munitions and bombs, the announcement noted, and was located in hills just above Palmyra in central Syria.
"The RAF jets used laser-guided Paveway IV weapons to target a series of access tunnels down to the facility... initial indications indicate the strike was effective," the ministry announced.
There was no indication of any civilian casualties in the operation on Saturday evening and all the aircraft returned to base without incident, the MoD added.
The Typhoon fighters were supported by a Voyager aerial refuelling aircraft.
The Islamic State group - alternatively referred to as Daesh - established militant control over parts of both Syria and Iraq prior to its 2019 collapse.
"This operation demonstrates the UK's leading role, and resolve to work closely with our partners, to stamp out any re-emergence of the terrorist group and their violent and radical beliefs in the Middle East," the British Defence Secretary John Healey remarked.
British military aircraft have performed surveillance missions over Syrian airspace to "forestall any attempted comeback" of Islamic State following its defeat at the Baghuz confrontation in 2019, the authorities noted.
"I must thank all the members of the UK armed forces who took part in this strike for their professionalism and their bravery," he said. "They were among a great many British troops on duty over the festive period. This mission, to remove militants who pose a risk to our safety, demonstrates how British military are ready to step up, all year round, keeping Britain secure at home and influential overseas."
Last December, the American forces carried out what it called a "massive strike" targeting Islamic State objectives in Syria, following an attack resulted in the deaths of two US servicemembers and a civilian interpreter in the Palmyra area.
The U.N. reports IS still boasts between 5,000 and 7,000 fighters in Iraq and Syria.
