British Air Force Typhoon fighter aircraft have joined forces with French warplanes in a combined operation against an subterranean weapons facility in Syria operated by the IS group, per a report from the UK's MoD.
The site, pinpointed through intelligence, was believed to be containing munitions and bombs, the statement said, and was positioned in hills just north of Palmyra in Syria's central region.
"Our fighter planes employed Paveway IV guided bombs to hit a series of access tunnels down to the depot... early reports are that the target was engaged successfully," the ministry announced.
There was no indication of any civilian impact in the attack late on Saturday and every plane involved returned safely, the MoD added.
The British jets were backed up by a Voyager aerial refuelling aircraft.
Daesh - also known as the so-called Islamic State - established jihadist rule over parts of Iraq and Syria prior to its 2019 collapse.
"This operation shows our UK leadership, and determination to stand shoulder to shoulder with allied nations, to eliminate any revival of the terrorist group and their harmful and extremist ideologies in the region," UK Defence Secretary the minister said.
UK warplanes have performed surveillance missions over Syrian airspace to "forestall any attempted comeback" of IS following its routing at the climactic battle in Baghuz in 2019, the ministry said.
"I must thank the personnel of the UK armed forces involved in this mission for their skill and their courage," he said. "They were part of a great many British troops on duty over Christmas and New Year. This operation, to take out dangerous terrorists who endanger our way of life, highlights how UK forces are ready to step up, throughout the year, keeping Britain secure within its borders and influential overseas."
In December, the US military conducted what it described as a "large-scale strike" targeting Islamic State objectives in Syria, subsequent to an ambush resulted in the deaths of two US servicemembers and a civilian interpreter in the Palmyra area.
The U.N. estimates IS still maintains an estimated 5,000 to 7,000 fighters in Iraq and Syria.
