NEW : Karzai condemns the incident . The Taliban have been fighting for years to overthrow President Hamid Karzai, who is backed by most of Afghanistan's ethnic groups. 9 civilians were killed , including some children . Gen. David Petraeus apologizes .
NEW : Karzai condemns the incident . Helicopters attacked after insurgents fired rockets at coalition troops . 9 civilians were killed , including some children . Gen. David Petraeus apologizes .