British Air Force Typhoon jets have conducted a mission with French aircraft in a combined operation against an underground arms cache in Syrian territory employed by the IS group, according to the UK Ministry of Defence.
The location, pinpointed through intelligence, was thought to be storing arms and explosives, the release indicated, and was positioned in mountainous terrain just above the historic site of Palmyra in the heart of Syria.
"Our fighter planes used precision-guided Paveway IV munitions to strike a number of access tunnels leading to the facility... preliminary assessments indicate the target was engaged successfully," the MoD said.
There was no sign of any civilian casualties in the strike late on Saturday and each participating jet returned safely, the MoD added.
The Typhoon FGR4s were assisted by a Voyager refuelling tanker.
The Islamic State group - alternatively referred to as Daesh - imposed jihadist rule over significant areas in Iraq and Syria until 2019.
"This action shows the UK's leading role, and commitment to operate in unison with our allies, to eliminate any re-emergence of the terrorist group and their violent and radical beliefs in the region," Britain's Defence Chief the minister said.
RAF aircraft have conducted surveillance missions over Syrian airspace to "deter any efforts to regroup" of the group subsequent to its defeat at the battle of Baghuz in the year 2019, the ministry said.
"I want to thank all the members of our armed forces involved in this operation for their expertise and their courage," he commented. "They were among thousands of British troops deployed over the festive period. This mission, to eliminate terrorist threats who threaten our security, highlights how UK forces are prepared to act, throughout the year, protecting the UK domestically and influential overseas."
In December, the US military executed what it described as a "massive strike" against Islamic State objectives in Syria, subsequent to an ambush killed two American soldiers and a civilian linguist in Palmyra.
The United Nations says Islamic State still has an estimated 5,000 to 7,000 fighters in Iraq and Syria.
