A British soldier from 14 Signal Regiment has been killed in southern Afghanistan, the Ministry of Defence (MoD) has said.
The soldier was serving with Battle Group South
The soldier - a communications specialist - died in a rocket attack while providing support to operations in Helmand province on Friday.
The soldier's next of kin have been informed and have requested a period of grace before his name is released.
The death brings the number of UK military fatalities since 2001 to 67.
The soldier was serving with Battle Group South on operation Chakush (Hammer) aimed at disrupting Taleban forces in the upper Gereshk Valley in Helmand Province, said the MoD.
The statement added that he came under attack at about 1530 local time while working in a compound between Heyderabad and Mirmandab.
Two other Nato troops and an Afghan soldier died in a separate clash with Taleban fighters in the country on Friday.
They were killed in an area of eastern Nuristan province. Thirteen Nato soldiers were wounded in the incident.
The latest British death means three UK troops have been killed in three days during heavy fighting in southern Afghanistan.
Lance Corporal Alex Hawkins, 22, of the Royal Anglian Regiment was the first to be killed on Wednesday, when a roadside bomb struck the vehicle he was travelling in.
The second was Guardsman David Atherton, 25, from the Grenadier Guards, who was shot during a firefight on Thursday after firing an anti-tank missile at Taleban positions.
BBC Kabul correspondent Alastair Leithead said the battles in the Gereshk valley area were a result of operation Chakush.
Up to 1,500 British troops and 500 Afghan, Estonian, Danish and US soldiers are involved in the mission to try to force Taleban insurgents further up the valley, our correspondent said.