British Air Force Typhoon fighter aircraft have conducted a mission with French aircraft in a joint strike targeting an underground arms cache in Syrian territory used by the IS group, according to the British defence ministry.
The facility, located using surveillance, was thought to be containing munitions and bombs, the statement said, and was situated in mountainous terrain just above the historic site of Palmyra in the heart of Syria.
"Our fighter planes employed Paveway IV guided bombs to target a number of approach shafts leading to the depot... initial indications suggest the target was engaged successfully," the ministry announced.
There was no sign of any civilian casualties in the operation conducted Saturday night and all the aircraft returned to base without incident, the defence officials confirmed.
The Typhoon fighters were assisted by a Voyager aerial refuelling aircraft.
Daesh - alternatively referred to as the so-called Islamic State - enforced jihadist rule over significant areas in Syria and Iraq until 2019.
"This strike underscores British leadership, and commitment to operate in unison with our allies, to stamp out any revival of Daesh and their dangerous and violent ideologies in the area," UK Defence Secretary the minister said.
RAF aircraft have conducted surveillance missions over Syrian airspace to "forestall any attempted resurgence" of IS after its defeat at the Baghuz confrontation in 2019, the authorities noted.
"I want to thank the personnel of the UK armed forces who took part in this mission for their expertise and their valour," he commented. "They were part of numerous British troops on duty over the festive period. This operation, to take out dangerous terrorists who threaten our security, highlights how British military are ready to step up, continuously, ensuring Britain's security at home and powerful internationally."
In December, the United States armed forces carried out what it called a "major assault" on IS targets in Syria, subsequent to an attack killed two American soldiers and a civilian interpreter in the Palmyra area.
The UN says Islamic State still maintains roughly 5-7 thousand fighters in both countries.
