Yahoo TV

STORY: The bomber behind Monday's (January 30) attack had been identified as a member of a militant network, Moazzam Jah Ansari, police chief of Khyber Pashtunkhwa province, told reporters without giving further details.

Ansari said the CCTV footage showed the bomber, wearing a helmet and a mask, riding his motorbike through the main checkpoint of Police Lines. He then parked his bike, asked for directions to the mosque and walked there. He said the police guards at the main entrance thought he was a member of the force and they didn't check him.

The bombing was the deadliest in a decade to hit Peshawar, a northwestern city that has suffered decades of Islamist militant violence and is located near the restive Pashtun tribal lands bordering Afghanistan. All but three of those killed were police officers, making it the worst attack on Pakistani security forces in recent history.

The most active militant group in the area, the Pakistani Taliban (TTP) has denied responsibility for the mosque attack. Pakistani officials say they suspect a breakaway faction of the TTP called Jamat-ul-Ahrar was involved.