RAF Typhoon fighter aircraft have operated alongside French aircraft in a coordinated attack against an underground arms cache in Syria employed by the IS group, as stated by the British defence ministry.
The site, located using reconnaissance, was thought to be housing weapons and explosive materials, the announcement noted, and was positioned in mountains just to the north of the ancient city of Palmyra in the heart of Syria.
"The RAF jets utilized laser-guided Paveway IV weapons to hit a several approach shafts providing entry to the depot... early reports indicate the strike was effective," officials stated.
There was no evidence of any civilian impact in the strike conducted Saturday night and every plane involved returned to base without incident, the defence officials confirmed.
The Typhoon FGR4s were assisted by a Voyager tanker plane.
The Islamic State group - also known as the so-called Islamic State - imposed jihadist rule over significant areas in both Syria and Iraq until 2019.
"This operation shows our UK leadership, and commitment to work closely with allied nations, to eliminate any resurgence of the terrorist group and their violent and radical beliefs in the region," Britain's Defence Chief the Defence Secretary stated.
British military aircraft have conducted surveillance missions over Syrian airspace to "deter any attempted comeback" of IS after its defeat at the climactic battle in Baghuz in 2019, the ministry said.
"I must thank all the members of our armed forces participating in this mission for their skill and their courage," he commented. "Including them were a great many UK service members on duty over the holidays. This operation, to remove militants who pose a risk to our security, shows how UK forces are ready to step up, continuously, keeping Britain secure at home and strong abroad."
In December, the American forces carried out what it called a "massive strike" targeting Islamic State objectives in Syria, following an attack killed two American soldiers and a civilian linguist in Palmyra.
The U.N. reports IS still has roughly 5-7 thousand fighters in Iraq and Syria.
