Image copyright AFP Image caption The incident happened at the Camp Lee-Burt Joint Military Operations Base
A military transport vehicle hit a US soldier on Wednesday, killing him and sending another to hospital in Afghanistan, US officials have said.
The military said the incident happened at a military base near the eastern Afghan city of Ghazni.
It comes days after an American and an Afghan died in an insider attack at a joint base in Kandahar.
Meanwhile, Taliban militants in southern Afghanistan have killed nine civilians and a military leader.
The head of Helmand’s governor’s office, Zalmai Ayubi, said the militant group’s fighters surrounded the district of Gereshk – across the Kabul River from Gereshk city – before attacking the district centre on Wednesday.
They stormed a local school and dug into homes, taking at least nine civilians and a military leader hostage.
The insurgents later killed one of their comrades.
The other soldier killed on Wednesday has been named as Randall Mutschler, a member of the Third Infantry Regiment from Fort Campbell in Kentucky.
The military said an investigation was under way.
Last week, US military spokesman Bryan Whitman said two members of US forces were killed and another wounded in an “inadvertent insider attack” in the southern province of Kandahar.
However, the US military command later said they had been mistakenly identified as enemy fighters.
The incident is also under investigation.
No further details have been given about the attack in Ghazni, which has seen a series of attacks on civilians and government officials over the past two years.
Troops from the US and the Afghan army killed around 300 militants in a recent operation to flush them out of a district called Abad Maghsood, the Pentagon said.
More information on the incident will be released as it becomes available, it added.