Gen Mohammad Daud Daud is one of at least six people killed in the attack, claimed by the Taliban.

Two German soldiers were killed and Gen Markus Kneip, commander of foreign troops in north Afghanistan, wounded.

Afghanistan has seen a series of attacks in recent months by militants on police and military targets.

Takhar provincial Governor Abdul Jabar Taqwa is among those wounded, officials said.

Gen Daud was former military commander of the Northern Alliance, the Afghan forces who fought the Taliban.