The NATO-led International Security Assistance Force (ISAF) said in a statement that two foreign soldiers had died following a small- arms attack in the eastern region. It did not reveal the nationalities of the deceased.
Most of the NATO troops in the eastern provinces are from the United States, while small units of French and Polish military forces are also based in the restive region.
The British soldier died of wounds he had sustained during a blast in the Nahre Saraj district of the southern province of Helmand on June 10, the Defence Ministry said.
The soldier died in hospital in Birmingham, the ministry said in a statement posted at its website.
Meanwhile, the Canadian Defence Ministry said two of the six soldiers killed in separate attacks in Afghanistan on Saturday were Canadians.
In a statement the ministry said a female Canadian soldier and her male comrade were killed in the Panjwayi district of the southern province of Kandahar when their vehicle was struck by a roadside bomb.
At least 310 international soldiers have been killed in Afghanistan in June, the deadliest month for NATO troops in the country since the ouster of the Taliban regime in late 2001.
Both Taliban and NATO-led troops are preparing for major battles this summer, when the total number of foreign troops is set to peak at 150,000 from the more than 130,000 currently based in the country.