British Air Force Typhoon FGR4s have conducted a mission with French aircraft in a combined operation targeting an underground arms cache in Syrian territory used by the Daesh militant organization, per a report from the UK's MoD.
The facility, located using intelligence, was believed to be containing munitions and bombs, the announcement noted, and was positioned in mountains just above Palmyra in the heart of Syria.
"The RAF jets employed precision-guided Paveway IV munitions to hit a series of entry passages providing entry to the facility... early reports indicate the objective was successfully hit," the MoD said.
There was no indication of any civilian casualties in the strike late on Saturday and every plane involved made a safe return, the defence officials confirmed.
The Typhoon FGR4s were assisted by a Voyager tanker plane.
The Islamic State group - referred to as the so-called Islamic State - enforced militant control over large swathes of both Syria and Iraq until 2019.
"This operation underscores British leadership, and resolve to work closely with allied nations, to eliminate any resurgence of the terrorist group and their harmful and extremist ideologies in the area," Britain's Defence Chief John Healey said.
UK warplanes have performed overwatch operations over Syrian airspace to "forestall any attempted comeback" of IS subsequent to its defeat at the battle of Baghuz in 2019, the authorities noted.
"I want to thank all the members of the UK armed forces participating in this operation for their professionalism and their bravery," he said. "They were among a great many UK service members stationed over the festive period. This mission, to eliminate dangerous terrorists who endanger our security, demonstrates how UK forces are ready to step up, throughout the year, ensuring Britain's security domestically and powerful internationally."
Last December, the US military carried out what it termed a "large-scale strike" targeting Daesh sites in Syria, after an ambush claimed the lives of two American soldiers and a local interpreter in Palmyra.
The UN reports IS still maintains between 5,000 and 7,000 fighters in both countries.
