The fatal aerial bombardment Saturday of a hospital in the Afghan city of Kunduz went on more than 30 minutes after officials in Washington and Kabul were informed, Doctors Without Borders said.

"The bombing continued for more than 30 minutes after American and Afghan military officials in Kabul and Washington were first informed," the medical charity said in a statement.

It added that "all parties to the conflict, including in Kabul and Washington, were clearly informed of the precise location (GPS coordinates) of the MSF facilities".