The United States (US) has launched an investigation into air strikes that killed 19 people at an Afghan medical charity, operated by Medecins Sans Frontiere (MSF).
The US military said a strike targeting Taliban in the northern city of Kunduz may have caused “collateral damage”.
At least 12 MSF staff members and seven patients were killed in the incident.
US President, Barack Obama, has offered his condolences, adding that he expected a “full accounting of the facts” after which he would make a definitive judgement.
The United Nations (UN) has described the strikes as “inexcusable and possibly even criminal”, with Secretary General, Ban Ki-moon, calling for a thorough and impartial investigation.
The MSF-run hospital was severely damaged by a series of strikes that lasted more than an hour from 02:00 local time on Saturday. Dozens were also injured in the attack.
MSF President, Meinie Nicolai, described the incident as “abhorrent and a grave violation of international humanitarian law”.