US air strike kills Afghan forces in friendly-fire incident

WASHINGTON - Afghan security forces were killed on Friday in a US military air strike in southern Afghanistan's Helmand province, the U.S. military said, calling the friendly-fire deaths "unfortunate" and pledging an investigation.
"We would like to express our deepest condolences to the families affected by this unfortunate incident," the US military said in a statement, adding the Afghan government had already been notified about the strike on a compound in Helmand's Gereshk district, where the Afghan forces were gathered.
It did not say how many Afghans were believed to be killed.