Besides the 30 civilians, two US service members were killed in the operation that targeted Taliban leaders planning additional attacks in Kunduz city.
"I deeply regret the loss of innocent lives, regardless of the circumstances," Gen. John W. Nicholson, commander of US forces in Afghanistan, said in a statement Saturday.
"The loss of innocent life is a tragedy and our thoughts are with the families. We will work with our Afghan partners to investigate and determine the facts and we will work with the government of Afghanistan to provide assistance."
