Royal Air Force Typhoon jets have operated alongside French warplanes in a joint strike against an underground arms cache in Syrian territory employed by the Islamic State group (IS), per a report from the UK's MoD.
The site, identified by reconnaissance, was believed to be housing weapons and explosive materials, the statement said, and was situated in mountainous terrain just above Palmyra in the heart of Syria.
"Our aircraft used precision-guided Paveway IV munitions to target a series of approach shafts down to the depot... early reports indicate the target was engaged successfully," the MoD said.
There was no sign of any civilian casualties in the strike late on Saturday and every plane involved returned safely, the defence officials confirmed.
The British jets were backed up by a Voyager tanker plane.
Daesh - referred to as Daesh - imposed extremist governance over large swathes of Iraq and Syria until 2019.
"This strike shows the UK's leading role, and resolve to stand shoulder to shoulder with allied nations, to eradicate any revival of Daesh and their dangerous and violent ideologies in the area," Britain's Defence Chief John Healey said.
UK warplanes have performed surveillance missions over Syrian airspace to "forestall any attempted resurgence" of IS after its routing at the Baghuz confrontation in 2019, the ministry said.
"I want to thank the personnel of the UK armed forces participating in this operation for their skill and their courage," Healey said. "Including them were a great many UK service members on duty over the festive period. This operation, to eliminate dangerous terrorists who threaten our way of life, demonstrates how British military are ready to step up, throughout the year, keeping Britain secure within its borders and influential overseas."
Last December, the United States armed forces conducted what it described as a "massive strike" on IS targets in the country, following an attack resulted in the deaths of two US troops and a civilian linguist in the Palmyra area.
The UN estimates IS still has between 5,000 and 7,000 fighters in Syria and Iraq.
