The soldiers were killed by friendly fire on Wednesday in what was supposed to be a precision air attack by US forces supporting Afghan soldiers battling armed fighters near Tarin Kot in Uruzgan province.
The Afghan defence ministry said earlier that the fatalities were the result of a miscommunication between Afghan troops on the ground and forces in the air. The ministry did not provide further details.
On Thursday, Obaidullah Barakzai, a legislator from Uruzgan province, told The Associated Press that Afghan soldiers inside the base in Tarin Kot believed a darkened convoy approaching the base was the Taliban – not US and Afghan forces – and opened fire, invoking a blistering retaliation.
The Taliban often travel in convoys with no vehicle lights on, Barikzai said.
The Taliban control vast areas of Uruzgan province, and Afghan security forces had been on alert that an attack could be coming.
A US air-to-ground attack was called in to aid the convoy when it came under fire.
Barikzai said it hit the Afghan army base, located less than 4km from the governor’s house, but other reports said the strike hit outside the post, which had recently been moved from one location to another.
The US military said it responded to incoming fire on Afghan and US forces on the ground and attempted to come to their defence by conducting a precision air attack.
Barikzai said many of the wounded in the deadly incident were in critical condition, but did not provide details.