British Air Force Typhoon jets have operated alongside France's air force in a coordinated attack on an underground arms cache in Syrian territory operated by the Daesh militant organization, according to the UK's MoD.
The location, identified by reconnaissance, was believed to be containing munitions and bombs, the statement said, and was situated in hills 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 entry passages down to the facility... early reports suggest the target was engaged successfully," the ministry announced.
There was no indication of any civilian casualties in the attack on Saturday evening and each participating jet returned to base without incident, the defence officials confirmed.
The Typhoon fighters were assisted by a Voyager tanker plane.
Daesh - also known as ISIS - enforced extremist governance over significant areas in Syria and Iraq prior to its 2019 collapse.
"This operation demonstrates British leadership, and commitment to operate in unison with our allies, to stamp out any re-emergence of IS and their dangerous and violent ideologies in the region," the British Defence Secretary the minister said.
British military aircraft have performed patrols over Syria to "forestall any attempted comeback" of IS after its routing at the battle of Baghuz in the year 2019, the ministry said.
"I must thank all the members of the UK armed forces involved in this strike for their skill and their bravery," he commented. "They were part of a great many British personnel deployed over the holidays. This mission, to eliminate militants who pose a risk to our way of life, shows how British military are ready to step up, all year round, protecting the UK within its borders and powerful internationally."
In December, the US military executed what it called a "major assault" targeting Islamic State objectives in the country, following an assault claimed the lives of two US troops and a local interpreter in the Palmyra area.
The UN says IS still has roughly 5-7 thousand militants in both countries.
