RAF Typhoon fighter aircraft have conducted a mission with French aircraft in a coordinated attack targeting an underground arms cache in Syria employed by the IS group, per a report from the UK's MoD.
The facility, identified by intelligence, was believed to be containing munitions and bombs, the statement said, and was positioned in mountains just to the north of the historic site of Palmyra in the heart of Syria.
"Our fighter planes employed precision-guided Paveway IV munitions to strike a several entry passages down to the facility... preliminary assessments suggest the strike was effective," the MoD said.
There was no indication of any civilian impact in the strike late on Saturday and each participating jet returned safely, the defence officials confirmed.
The Typhoon FGR4s were supported by a Voyager refuelling tanker.
Daesh - referred to as ISIS - imposed militant control over significant areas in both Syria and Iraq before its territorial defeat in 2019.
"This operation demonstrates the UK's leading role, and resolve to operate in unison with our partners, to eliminate any revival of IS and their dangerous and violent ideologies in the region," the British Defence Secretary the minister said.
RAF aircraft have conducted overwatch operations over Syria to "prevent any efforts to regroup" of the group following its military defeat at the climactic battle in Baghuz in 2019, the authorities noted.
"I extend gratitude to the personnel of British forces involved in this mission for their expertise and their valour," Healey added. "They were part of numerous British troops stationed over the festive period. This operation, to eliminate terrorist threats who threaten our safety, demonstrates how British military are always on standby, continuously, keeping Britain secure at home and influential overseas."
In December, the American forces executed what it described as a "massive strike" targeting Islamic State objectives in the country, following an assault killed two US troops and a civilian interpreter in the Palmyra area.
The United Nations says Daesh still boasts between 5,000 and 7,000 fighters in Iraq and Syria.
