British Air Force Typhoon jets have conducted a mission with French aircraft in a coordinated attack on an underground arms cache in Syria employed by the IS group, according to the UK's MoD.
The site, pinpointed through intelligence, was assessed as housing weapons and explosive materials, the statement said, and was positioned in mountainous terrain just north of Palmyra in central Syria.
"Our fighter planes utilized precision-guided Paveway IV munitions to hit a series of approach shafts leading to the facility... preliminary assessments are that the objective was successfully hit," the MoD said.
There was no sign of any civilian casualties in the attack conducted Saturday night and each participating jet made a safe return, the defence officials confirmed.
The British jets were assisted by a Voyager tanker plane.
The Islamic State group - referred to as ISIS - enforced militant control over parts of Syria and Iraq prior to its 2019 collapse.
"This operation underscores the UK's leading role, and commitment to stand shoulder to shoulder with our partners, to eradicate any revival of the terrorist group and their harmful and extremist ideologies in the region," the British Defence Secretary the minister remarked.
British military aircraft have performed patrols over Syria to "forestall any attempted comeback" of the group following its routing at the Baghuz confrontation in the year 2019, the MoD reported.
"I want to thank the personnel of British forces participating in this operation for their expertise and their valour," he commented. "Including them were a great many UK service members stationed over the holidays. This operation, to eliminate terrorist threats who threaten our safety, shows how UK forces are prepared to act, continuously, protecting the UK at home and strong abroad."
During December, the United States armed forces carried out what it called a "major assault" against IS targets in the country, following an assault claimed the lives of two US servicemembers and a civilian interpreter in the Palmyra area.
The United Nations estimates Daesh still maintains an estimated 5,000 to 7,000 combatants in Syria and Iraq.
