A suicide car bomber was killed on Thursday in an abortive attack on Nato troops near the town of Farah in western Afghanistan.
Officials say that the bomber's explosive device detonated too soon and that no-one else was injured.
They say that the bomb exploded in a secluded area near a base in the town used by US military forces.
The incident follows a series of similar attacks across the country which have been blamed on the Taleban.
"We do not know the target of the attack, but we can say it was a suicide raid and there were no other casualties apart from the suicide car bomber," the Governor of Farah, Izatullah Wasifiold, told the Reuters news agency.
Around 900 people have been killed in the Afghan insurgency since the beginning of the year, with half of that total dying in May.
Nato officials say that US-led air strikes have inflicted heavy casualties on Taleban insurgents in the south of Afghanistan throughout May.