A suicide bomber in northwest Pakistan has wounded a militant commander and killed at least six people.

Officials say Maulvi Nazir was one of at least 12 people wounded in the blast Thursday in Wana, the main town in the South Waziristan tribal region.

He is the most prominent militant commander in South Waziristan, with fighters who support the Taliban in Afghanistan and are not hostile to Pakistani authorities.

There was no immediate claim of responsibility for the bombing.