Summary At least three British soldiers were killed in blast in Afghanistan’s district of Nahr-e Saraj.
LONDON (AFP) - Prime Minister David Cameron said Wednesday that Britain was paying a "very high price" in Afghanistan after three soldiers were killed by a roadside bomb.
Six British soldiers have now been killed this year in Afghanistan, where British casualties have slowed over the past year.
Britain has not lost so many soldiers in one incident since six were killed by a similar blast in March last year.
The defence ministry named the men as Corporal William Thomas Savage, Fusilier Samuel Flint and Private Robert Murray Hetherington.
They received immediate medical attention at the scene of the blast in Helmand province on Tuesday and were evacuated by air to Britain s main Camp Bastion base but could not be saved, the ministry said.
The deaths take the total number of British troops killed by enemy action in Afghanistan over the 400 mark, to 401, of a total of 444 who have lost their lives in the campaign begun in October 2001.
"We have paid a very high price for the work we re doing in Afghanistan," Cameron told ITV television.
"It is important work because it s vital that country doesn t again become a haven for terrorists -- terrorists that can threaten us here in the UK.
"But today our thoughts should be with the families and friends of those that have suffered."
The three soldiers vehicle was hit on a routine patrol in the district of Nahr-e Saraj.
"Their deaths come as a great loss to all those serving in Task Force Helmand," spokesman Major Richard Morgan said in a statement.
Defence Secretary Philip Hammond said he was "deeply saddened" by the news.
"It is clear from the tributes paid to them that they were exceptional men who served their country with distinction," he added.
Their families have been informed.
It is the first time since September 2012 that British troops have been killed by a roadside bomb, which have caused many of the British deaths in Afghanistan.
There was no immediate claim of responsibility but Taliban militants frequently use roadside bombs against foreign troops and their Afghan allies.
