A Taliban suicide bomber blew himself up in a mosque packed with worshippers during afternoon prayers on Monday in the high-security zone in Pakistans restive northwestern Peshawar city, killing at least 61 people and wounding more than 150 others, mostly policemen, officials said.The powerful blast occurred inside the mosque in the Police Lines area around 1.40 pm when worshippers, which included personnel of the police, army and bomb disposal squad - were offering the Zuhr afternoon prayers.