Police on Wednesday arrested a Shia Muslim suspected in the shooting death last year of a prominent, pro-Taliban Sunni Muslim cleric in Karachi, an investigator said. Nafees Khan, 30, was nabbed in a police raid on a house in an eastern neighborhood of Karachi, said senior police investigator Farooq Awan. The raid came after a witness had earlier identified Khan from a picture in a police database of militant suspects as one of the six gunmen who shot the cleric Mufti Nizamuddin Shamzai in May 2004, Awan said. Shamzai was gunned down as he was driving to an Islamic school that he headed. His son, nephew and his driver were wounded in the attack. Awan described Khan as a "prime suspect for us" but would not say whether Khan was linked with any militant group.