RAF Typhoon FGR4s have conducted a mission with France's air force in a coordinated attack on an subterranean weapons facility in Syria used by the Islamic State group (IS), per a report from the UK Ministry of Defence.
The site, pinpointed through surveillance, was thought to be housing weapons and explosive materials, the statement said, and was positioned in hills just north of the historic site of Palmyra in the heart of Syria.
"Our aircraft used precision-guided Paveway IV munitions to hit a several access tunnels down to the site... preliminary assessments are that the target was engaged successfully," the MoD said.
There was no sign of any civilian impact in the strike late on Saturday and every plane involved made a safe return, the MoD added.
The Typhoon FGR4s were assisted by a Voyager aerial refuelling aircraft.
IS - referred to as ISIS - enforced militant control over significant areas in both Syria and Iraq before its territorial defeat in 2019.
"This strike underscores British leadership, and commitment to work closely with our allies, to stamp out any re-emergence of the terrorist group and their violent and radical beliefs in the area," UK Defence Secretary John Healey said.
UK warplanes have conducted overwatch operations over Syrian airspace to "prevent any efforts to regroup" 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 the UK armed forces involved in this mission for their professionalism and their bravery," Healey said. "They were among numerous British troops stationed over the festive period. This action, to remove dangerous terrorists who pose a risk to our safety, shows how British military are always on standby, throughout the year, keeping Britain secure within its borders and powerful internationally."
During December, the American forces carried out what it called a "massive strike" on Islamic State objectives in the country, following an assault resulted in the deaths of two US troops and a civilian linguist in Palmyra.
The U.N. estimates Daesh still boasts roughly 5-7 thousand fighters in Iraq and Syria.
