An Afghan official says a roadside bomb has killed five border police in an eastern province near the border with Pakistan.

Ahmad Zia Abdulzai, who is a spokesman for the governor of Nangarhar province, says the five were killed Friday evening when the vehicle in which they were patrolling was hit by the remote-controlled bomb.

He said Saturday that the incident took place in the province's Dur Baba district.

Militants commonly plant bombs along roads used by security forces, inflicting heavy casualties on the military and also on civilians.