RAF Typhoon fighter aircraft have joined forces with French warplanes in a combined operation against an hidden munitions depot in Syrian territory used by the IS group, per a report from the UK Ministry of Defence.
The facility, identified by intelligence, was believed to be storing arms and explosives, the statement said, and was located in mountainous terrain just to the north of the ancient city of Palmyra in Syria's central region.
"Our fighter planes employed Paveway IV guided bombs to target a several entry passages down to the facility... preliminary assessments are that the target was engaged successfully," the MoD said.
There was no sign of any civilian casualties in the strike conducted Saturday night and every plane involved made a safe return, the MoD added.
The British jets were assisted by a Voyager aerial refuelling aircraft.
The Islamic State group - also known as ISIS - established extremist governance over significant areas in Iraq and Syria prior to its 2019 collapse.
"This operation shows our UK leadership, and determination to work closely with our partners, to eliminate any re-emergence of Daesh and their violent and radical beliefs in the area," the British Defence Secretary the Defence Secretary said.
British military aircraft have conducted overwatch operations over Syria to "prevent any attempted resurgence" of the group after its routing at the climactic battle in Baghuz in 2019, the ministry said.
"I want to thank the personnel of our armed forces involved in this strike for their expertise and their courage," Healey added. "Including them were thousands of UK service members stationed over Christmas and New Year. This operation, to remove terrorist threats who pose a risk to our way of life, highlights how British military are prepared to act, continuously, keeping Britain secure at home and strong abroad."
In December, the US military carried out what it termed a "massive strike" on Islamic State objectives in Syria, subsequent to an attack resulted in the deaths of two American soldiers and a civilian linguist in Palmyra.
The U.N. says Islamic State still boasts an estimated 5,000 to 7,000 combatants in Syria and Iraq.
