British Air Force Typhoon jets have conducted a mission with French aircraft in a combined operation targeting an underground arms cache in Syria used by the IS group, according to the British defence ministry.
The site, located using intelligence, was thought to be storing arms and explosives, the statement said, and was situated in hills just to the north of the historic site of Palmyra in Syria's central region.
"The RAF jets used Paveway IV guided bombs to target a series of access tunnels providing entry to the site... initial indications are that the objective was successfully hit," the ministry announced.
There was no evidence of any civilian casualties in the attack on Saturday evening and every plane involved returned to base without incident, the ministry further stated.
The Typhoon fighters were assisted by a Voyager tanker plane.
Daesh - also known as ISIS - established extremist governance over significant areas in Iraq and Syria prior to its 2019 collapse.
"This action shows British leadership, and commitment to operate in unison with our partners, to eradicate any resurgence of IS and their dangerous and violent ideologies in the Middle East," UK Defence Secretary John Healey stated.
RAF aircraft have conducted overwatch operations over Syria to "prevent any efforts to regroup" of Islamic State following its military defeat at the climactic battle in Baghuz in 2019, the authorities noted.
"I must thank the personnel of British forces participating in this strike for their professionalism and their courage," Healey added. "They were part of a great many British personnel deployed over the festive period. This mission, to remove dangerous terrorists who endanger our security, shows how British military are always on standby, continuously, keeping Britain secure at home and influential overseas."
In December, the United States armed forces executed what it termed a "massive strike" on IS targets in the country, subsequent to an attack killed two US servicemembers and a civilian interpreter in the Palmyra area.
The UN reports Daesh still boasts an estimated 5,000 to 7,000 fighters in Syria and Iraq.
