German Chancellor Angela Merkel has called for an urgent investigation into an airstrike in northern Afghanistan, BBC reported.
There are reports civilians were among the victims of Friday's German-ordered raid, in which Afghan officials say up to 70 people were killed.
Ms Merkel said if any civilians died in the Kunduz province strike, she would "naturally deeply regret that".
In an announcement with UK PM Gordon Brown, she also said a major summit on Afghanistan should be held this year.
Friday's airstrike was called in by a German commander after Taliban rebels hijacked two fuel tankers.