An Afghan army vehicle has hit a roadside bomb in northern Afghanistan, killing three Afghan soldiers and wounding three others.

Lal Mohammad Ahmadzai, a spokesman for the Afghan National Police in northern Afghanistan, says the explosion occurred around 3 a.m. Thursday as the soldiers were patrolling in Baghlan province.

No one has claimed responsibility for the attack, but the Taliban are targeting Afghan forces this summer to try to prove they are too weak to take over from exiting foreign combat troops.

Two other roadside bombings occurred in Baghlan last month, including one that killed four Afghan policemen.

In the other attack, the Afghan minister of higher education escaped unharmed when a roadside bomb hit a vehicle in his convoy. Two of his bodyguards were injured in the blast.