Tehreek-e-Taliban chief Mullah Fazlullah, who masterminded the Peshawar school massacre, was believed to be killed after being seriously hit in air strikes in Pakistan's restive Khyber tribal area over the weekend.
Bhutto, the Pakistan Peoples Party chief and a two-time prime minister, was killed along with more than 20 people in a gun and bomb attack in Rawalpindi's Liaquat Bagh during an election campaign rally on December 27, 2007. She was 54.
The brazen Karachi airport attack clearly suggests the role of the Pakistani Taliban's sleeper cells in the city that must have planned it during the interval when their central leadership was busy talking peace with the government, a media report said on Thursday.
Former Pakistani military ruler Pervez Musharraf was on Tuesday indicted by an anti-terrorism court in the 2007 assassination of ex-premier Benazir Bhutto.