British Air Force Typhoon FGR4s have conducted a mission with French warplanes in a joint strike on an subterranean weapons facility in Syria used by the IS group, according to the UK Ministry of Defence.
The site, pinpointed through intelligence, was assessed as housing weapons and explosive materials, the announcement noted, and was situated in hills just to the north of the historic site of Palmyra in Syria's central region.
"Our aircraft used Paveway IV guided bombs to target a series of approach shafts down to the site... initial indications are that the target was engaged successfully," the ministry announced.
There was no evidence of any civilian casualties in the strike on Saturday evening and every plane involved returned safely, the MoD added.
The Typhoon FGR4s were backed up by a Voyager aerial refuelling aircraft.
The Islamic State group - alternatively referred to as the so-called Islamic State - imposed extremist governance over parts of Iraq and Syria until 2019.
"This strike underscores the UK's leading role, and determination to work closely with allied nations, to stamp out any re-emergence of the terrorist group and their harmful and extremist ideologies in the region," the British Defence Secretary the Defence Secretary said.
UK warplanes have carried out surveillance missions over Syrian airspace to "forestall any attempted comeback" of the group subsequent to its defeat at the climactic battle in Baghuz in 2019, the MoD reported.
"I want to thank all the members of the UK armed forces involved in this mission for their expertise and their bravery," Healey added. "They were among numerous British personnel stationed over the festive period. This mission, to eliminate dangerous terrorists who pose a risk to our security, highlights how British military are prepared to act, throughout the year, ensuring Britain's security within its borders and strong abroad."
In December, the US military carried out what it termed a "massive strike" on IS targets in Syria, subsequent to an ambush claimed the lives of two US servicemembers and a civilian interpreter in the Palmyra area.
The UN estimates Daesh still boasts between 5,000 and 7,000 militants in Iraq and Syria.
