US President Barack Obama has apologised to medical charity Médecins sans Frontières (Doctors Without Borders) following the bombing of a hospital in Afghanistan, the White House said.
The air strike at the MSF-run hospital in Kunduz killed 22 people, including three children.
Medical aid group Medicens Sans Frontieres (MSF) has called for an "independent international body" to investigate the air strike that killed 22 people at its hospital in Kunduz, Afghanistan.
"Under the clear presumption that a war crime has been committed, MSF demands that a full and transparent investigation into the event be conducted by an independent international body," Christopher Stokes, MSF General Director said.
The group earlier denied that Taliban fighters were firing from its hospital at Afghan and Nato forces before the strike, which is thought to have been carried out by US planes.
MSF also updated the death toll from the attack, saying that 12 staff member and ten patients were killed, including three children.
There could be a long wait for answers as to how and why Kunduz hospital ended up being on the receiving end of US air strikes.
Medical charity worker relates how he and colleagues tried to save patients and staff following devastating air strike.