British Air Force Typhoon fighter aircraft have operated alongside France's air force in a joint strike targeting an underground arms cache in Syrian territory used by the IS group, as stated by the UK Ministry of Defence.
The location, pinpointed through surveillance, was believed to be storing arms and explosives, the statement said, and was situated in mountains just above the ancient city of Palmyra in the heart of Syria.
"Our aircraft employed precision-guided Paveway IV munitions to hit a several access tunnels providing entry to the site... early reports indicate the strike was effective," the MoD said.
There was no indication of any civilian impact in the operation late on Saturday and each participating jet returned to base without incident, the ministry further stated.
The Typhoon FGR4s were backed up by a Voyager refuelling tanker.
Daesh - also known as the so-called Islamic State - established jihadist rule over large swathes of Syria and Iraq prior to its 2019 collapse.
"This operation demonstrates British leadership, and commitment to work closely with our allies, to eradicate any revival of Daesh and their harmful and extremist ideologies in the region," UK Defence Secretary the minister remarked.
British military aircraft have carried out overwatch operations over Syrian airspace to "prevent any attempted comeback" of Islamic State subsequent to its military defeat at the battle of Baghuz in 2019, the ministry said.
"I must thank every member of the UK armed forces involved in this strike for their professionalism and their courage," he commented. "They were part of numerous British personnel stationed over the holidays. This action, to remove dangerous terrorists who pose a risk to our way of life, shows how our armed forces are prepared to act, continuously, protecting the UK within its borders and strong abroad."
In December, the US military carried out what it described as a "massive strike" against Islamic State objectives in Syria, after an attack killed two American soldiers and a local interpreter in Palmyra.
The United Nations says IS still maintains an estimated 5,000 to 7,000 militants in both countries.
