Qari Hussain Ahmad Mehsud (Pashto/Urdu: قارى حسین احمد) (6 December 1988 – 7 October 2010) was a top lieutenant in the Tehrik-i-Taliban Pakistan (TTP) and the organizer of the group's suicide bombing squads.

[6] Hussain ran a training camp for suicide bombers in South Waziristan[7] and had been active in violent acts against the Pakistani government.

[11] On 2 November 2009 the reward was increased to 50 million rupees ($600,000) [12][13][14] A report by the Press Trust of India cited sources affirming that Hussain was killed on 14 January 2010, in the American drone airstrike in North Waziristan that reportedly killed Taliban leader Hakimullah Mehsud;[15] however, Hussain apparently spoke with local media by telephone to deny Mehsud's death.

[18] Hussain claimed responsibility for the 2010 Times Square car bomb attempt in an audiotape that was posted on the Tehreek-e-Taliban Pakistan News Channel on the website YouTube.

[19] Authorities in Pakistan believe that Faisal Shahzad, the Pakistani-American who admitted to planting the Times Square car bomb, was introduced to Hussain via Mohammad Rehan, and subsequently received explosives training before he returned to the United States.