KABUL, Afghanistan (AP) -- Afghan officials say at least two demonstrators have been killed in northern Afghanistan as protests over last week's burning of Qurans turned violent.
It marked the sixth day of deadly protests over the burning of Qurans and other religious materials at a U.S. base. The White House has called the incident a mistake and apologized to the Afghan government but demonstrations have continued.
The administrator of Iman Sahib district in Kunduz province says Sunday's protest turned violent as demonstrators tried to enter the district's largest city.
He says people in the crowd fired on police and threw grenades at a U.S. base nearby.
NATO said initial reports indicated no international service members were killed.