A police constable opened fire killing one of his colleagues and wounding four others in Afghanistan's western Herat province while explosion claimed the lives of two civilians there, officials said Monday.

In the first incident, according to police spokesman in west Afghanistan Abdul Rauf Ahmadi, a police constable opened fire on his colleagues Sunday night killing one police constable and injuring four others.

Ahmadi also added that the culprit after opening fire and killing a police constable run away but on the way his car rammed into a tree and badly injured.

In another incident, an explosion rocked a bazaar in Shindand district on Sunday and wounding two brothers, governor of Shindand district Lal Mohammad Omarzai told Xinhua.