A man calling himself a deputy of Tehreek-e-Taliban Pakistan (TTP) chief Baitullah Mehsud told AFP on Wednesday that his commander had ordered the killing a day earlier of a key tribal rival. Qari Zainuddin -- a young rising tribal leader who was increasingly critical of Baitullah's use of suicide bombings targeting civilians -- was shot dead at a house in Dera Ismail Khan early on Tuesday. "We killed Qari Zainuddin because he was a traitor, he was killed on the orders of Baitullah," said Waliur Rehman, who called an AFP reporter in Peshawar from an unknown location. "Anyone who works against us will face the same fate," he added. Zainuddin spilt from the TTP about nine months ago.