RAF Typhoon jets have joined forces with French warplanes in a combined operation against an hidden munitions depot in Syria used by the IS group, according to the UK Ministry of Defence.
The site, located using reconnaissance, was thought to be containing munitions and bombs, the statement said, and was located in mountains just north of Palmyra in the heart of Syria.
"The RAF jets utilized laser-guided Paveway IV weapons to hit a number of access tunnels providing entry to the site... initial indications indicate the target was engaged successfully," the ministry announced.
There was no sign of any civilian casualties in the attack conducted Saturday night and all the aircraft returned to base without incident, the MoD added.
The Typhoon FGR4s were backed up by a Voyager refuelling tanker.
The Islamic State group - alternatively referred to as the so-called Islamic State - imposed jihadist rule over parts of Iraq and Syria until 2019.
"This operation shows British leadership, and commitment to stand shoulder to shoulder with our allies, to eradicate any revival of Daesh and their harmful and extremist ideologies in the Middle East," UK Defence Secretary the minister stated.
RAF aircraft have carried out surveillance missions over Syria to "forestall any attempted resurgence" of the group after its routing at the climactic battle in Baghuz in the year 2019, the authorities noted.
"I want to thank the personnel of our armed forces who took part in this operation for their professionalism and their valour," the Defence Secretary said. "They were part of thousands of British personnel stationed over Christmas and New Year. This mission, to eliminate dangerous terrorists who endanger our way of life, shows how UK forces are prepared to act, all year round, ensuring Britain's security within its borders and strong abroad."
In December, the United States armed forces executed what it called a "massive strike" on Daesh sites in the country, after an assault resulted in the deaths of two American soldiers and a civilian interpreter in the Palmyra area.
The United Nations says Islamic State still has an estimated 5,000 to 7,000 militants in Syria and Iraq.
