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Eight others were wounded in the attack

The attack occurs in Kandahar

Kabul, Afghanistan CNN —  

Four people were killed and eight wounded Wednesday morning after a motorcycle bomb exploded in southern Afghanistan, Kandahar regional officials said.

Only civilians were injured in the attack that occurred in Kandahar province, the officials said.

Kandahar has been one of the areas that has seen protests and violence since news emerged, late last month, that U.S. troops mistakenly burned Qurans and other religious materials.

Afghan officials have said the NATO-led International Security Assistance Force has been targeted for attacks including the March 1 shooting of two NATO soldiers in Kandahar.

There were no Afghan security forces or NATO soldiers in the area when Wednesday’s blast occurred, officials said.

CNN’s Nick Paton Walsh contributed to this report.