Police say a suicide bomber riding on a bicycle has targeted a vehicle carrying security forces in southwestern Pakistan, killing at least eight people and wounding more than 20.

Senior police officer Imtiaz Shah says the attacker blew himself up Saturday near a vehicle belonging to the paramilitary Frontier Corps in Quetta, the capital of Baluchistan province.

Government spokesman Anwar Kakar says the attack killed six civilians and two members of the security forces. No one claimed the attack.

Baluchistan has long been the scene of a low-level insurgency by Baloch separatist groups. Islamic militants also operate in the province.