Pakistani police officers carry coffins of their fallen colleagues who were killed in Thursday's suicide attack in Peshawar, Pakistan on Friday, Nov. 20, 2009. A suicide attacker killed 19 people while trying to enter in courthouses in Peshawar. (AP Photo/Mohammad Sajjad)AP – Pakistani troops killed 18 militants in a fresh offensive Tuesday against insurgents blamed for a wave of recent bombings in the main northwestern city of Peshawar.