A spokesman for the US military confirmed late Friday a US airstrike killed at least nine local security personnel aligned with Afghan Government forces, the Washington Post reported. 
The airstrike took place in the Gereshk district of Helmand province, where US and Afghan forces have been locked in fierce fighting with the Taliban. Local media reports put the number of dead at 17. 
A US military statement said that an investigation would be conducted "to determine the specific circumstances that led to this incident."
Helmand’s governor, Hayatullah Hayat, said that two commanders of the national police were among those killed and that many bodies were still under rubble, making an exact toll hard to determine.

Source: Mena