The Pentagon is trying to justify itself as follows:
From intelligence information was obtained that the Taliban militants are concentrated in the area.
In the attack on the Afghan checkpoint, two attack helicopters of the US Air Force took part, the pilots of which did not bother themselves with the proceedings of who they were launching missiles for.

The head of the province confirmed the information about the death of 14 Afghan soldiers. He is quoted by the edition. The Express Tribune:
At 6: 00 in the morning hours today two US helicopters attacked a checkpoint in the Baraki Barak area.
A spokesman for the Afghan Defense Ministry said that the Afghan flag was flying over the roadblock, and he (a military official) did not understand how the American pilots could have overlooked this.
This is not the first case of the so-called "friendly fire" by the US military in Afghanistan.