RAF Typhoon fighter aircraft 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 believed to be housing weapons and explosive materials, the statement said, and was located in mountainous terrain just to the north of Palmyra in the heart of Syria.
"Our fighter planes employed Paveway IV guided bombs to strike a series of approach shafts leading to the facility... initial indications suggest the objective was successfully hit," the MoD said.
There was no sign of any civilian casualties in the operation conducted Saturday night and every plane involved returned safely, the MoD added.
The British jets were assisted by a Voyager aerial refuelling aircraft.
The Islamic State group - alternatively referred to as Daesh - imposed jihadist rule over significant areas in Iraq and Syria before its territorial defeat in 2019.
"This strike shows British leadership, and commitment to work closely with our partners, to eradicate any revival of IS and their harmful and extremist ideologies in the region," Britain's Defence Chief the minister remarked.
RAF aircraft have carried out surveillance missions over Syrian airspace to "deter any attempted comeback" of the group subsequent to its defeat at the climactic battle in Baghuz in 2019, the authorities noted.
"I extend gratitude to all the members of our armed forces participating in this operation for their skill and their courage," he commented. "They were part of a great many British personnel on duty over the holidays. This mission, to take out terrorist threats who endanger our way of life, shows how our armed forces are ready to step up, continuously, keeping Britain secure at home and powerful internationally."
During December, the American forces executed what it termed a "massive strike" on IS targets in the country, following an ambush killed two US troops and a civilian interpreter in Palmyra.
The U.N. says Islamic State still maintains roughly 5-7 thousand militants in Iraq and Syria.
