Soldiers arrive at a police station in northwestern Pakistan where attackers wearing police uniforms killed four people and wounded eight.
Local media reported one of the attackers was shot dead by soldiers as he tried to scale a wall.
Three of the attackers wore explosive vests which they detonated inside the building. Soldiers and other security forces spent most of Saturday trying to secure the premises, questioning possible witnesses. Pakistan's interior minister says they expect to have a better understanding of the operation later in the evening.
The Pakistani Taliban claimed responsibility for the attack.
Deborah Gembara, Reuters