An Afghan official says at least three members of the security forces have been killed when a roadside bomb exploded near their vehicle in eastern Afghanistan.

Gen. Abdul Habib Sayedkhaili, the Kunar provincial police chief, said on Saturday the dead include the police chief and intelligence chief of Sarkano district.

Two police officers were also wounded in the attack, he says.

Sayedkhaili said four insurgents were killed and another three wounded in a gun battle in the district earlier Saturday.

Kunar is a particularly volatile region of eastern Afghanistan where Taliban-led insurgents have intensified their attacks on Afghan security forces.

Meanwhile a state TV journalist and cultural adviser for the provincial governor was killed by unknown gunmen Friday night in neighboring Nangarhar province, said Salim Kunduzi, Nangarhar's provincial governor.