At least seven people were killed and 16 wounded on Monday after a powerful bomb went off outside the office of a pro-government peace committee in a former stronghold of the Pakistani Taliban in the restive northwest, police said.

The attack happened in Wana, a main city in the district of South Waziristan in Khyber Pakhtunkhwa province, a local police chief, Usman Wazir, told The Associated Press.