Kabul: NATO said Saturday a US air strike ‘may have’ hit a hospital run by the medical charity Doctors Without Borders (MSF) in the embattled Afghan city of Kunduz.

‘US forces conducted an air strike in Kunduz city at 2:15 am (local time)... against individuals threatening the force. The strike may have resulted in collateral damage to a nearby medical facility. This incident is under investigation,’ a NATO statement said.

Medical aid group Medecins Sans Frontieres (MSF) said on Saturday its hospital in the Afghan city of Kunduz was partially destroyed, three staff were killed and 30 staff were unaccounted for after overnight bombing.

Fighting has raged around the northern provincial capital for the last six days after Taliban militants captured the city in their biggest victory of a nearly 14-year insurgency.

‘We are deeply shocked by the attack, the killing of our staff and patients and the heavy toll it has inflicted on healthcare in Kunduz,’ MSF said in a statement.

Taliban fighters in Kunduz were still holding out against Afghan troops on Friday, a day after government forces recaptured most of the city.