President Barack Obama says the US has launched a " full investigation " into air strikes that killed 19 people at an MSF - run Afghan hospital on Saturday. The US military says a strike targeting Taliban in the northern city of Kunduz may have caused "collateral damage". Offering his "deepest condolences", Obama said he expected a "full accounting of the facts" and would then make a definitive judgment. At least 12 MSF staff members and seven patients were killed in the incident. The UN called the strikes "inexcusable and possibly even criminal", with Secretary General Ban Ki-moon calling for a thorough and impartial investigation. "International and Afghan military planners have an obligation to respect and protect civilians at all times, and medical facilities and personnel are the object of a special protection," said UN High Commissioner Ra'ad Al Hussein Zeid.