PESHAWAR: Gunmen attacked a police convoy on its way to an illegal gold mining operation in Pakistan's northwestern region on Wednesday, killing eight officers, officials said.

A senior administrative official in Khyber Pakhtunkhwa province's Kohat district told AFP eight police personnel were killed and 13 others were injured.

Militants set two police vehicles on fire during the assault, while two other police vehicles and one private vehicle were missing, the official said.

He said the officers were travelling to an illegal gold mining operation near Gumbat.