At least eight Afghans working with US forces have been killed in a Nato air strike in north-western Afghanistan, the defence ministry in Kabul says.
Nato confirms an air strike was ordered and is investigating whether it was the cause of the deaths on Friday.
It was launched as US and Afghan forces reportedly came under insurgent attack during search operations in Badghis province for two missing US soldiers.
Five Americans and 18 Afghans were also wounded on Friday.
The Afghan defence ministry said a base housing coalition troops and Afghan security forces was mistakenly hit.
Four Afghan soldiers, three police and another person believed to have been an interpreter were killed.
A spokesperson for the Nato force, US Navy Capt Jane Campbell, said: "We are saddened by the loss of life and injuries sustained during this very important mission."
The Afghan deaths c
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