Article published on the 2009-06-23 Latest update 2009-06-23 09:37 TU
The 26-year-old split from Mehsud's Tehreek-e-Taliban Pakistan faction nine months ago and told local media last week that he would be in favour of military action against his former commander.
Also on Tuesday, a suspected US missile attack in the South Waziristan region, a Mehsud stronghold, killed six people.
Tuesday’s assassination comes as the Pakistani army plans a new offensive against Taliban forces led by Mehsud.
Earlier this year the United States put a $5 million bounty on his head for information leading to his capture.
Meanwhile, shops and markets in Quetta held a partial strike in protest at the killing of two Shiite Muslims on Monday.