Two soldiers from the Royal Logistic Corps have been killed in a fire at Camp Bastion in Afghanistan, the Ministry of Defence said.
The incident, which is under investigation, is not believed to have been caused by enemy action and next of kin have been informed.
Camp Bastion spokesman Wing Commander Martin Tinworth said: “Both soldiers were involved in vital support work for the UK forces who continue to bring hope and stability across Afghanistan. Our heartfelt condolences go out to both soldiers’ family and friends at this deeply sad time.”
Wing Cdr Tinworth said the soldiers had died in a fire and the MoD said more information would be released when known.
It was thought the blaze could have been caused by a boiler rather than a kitchen or weapons-related incident.
It takes the number of UK military personnel who have died since operations in Afghanistan began in 2001 to 356.
Meanwhile a British commander said the tide was turning against the insurgency in Helmand Province, with morale high among troops.
Brigadier James Chiswell, head of UK forces in Helmand, told the BBC: “There’s certainly a sense over this winter period that the insurgency is under a lot of pressure, but perhaps more importantly there’s certainly a sense of growing local confidence to shake off the insurgency, and indeed to put their trust in the state.”
But he also sounded a note of caution, warning that it was too early to say how successful the past few months had been until summer fighting had taken place.