**A suspected suicide bomb attack in Pakistan’s north-western Swat valley has killed at least 12 police recruits and injured others, officials say.**The explosion occurred as the cadets were being trained at a police base.
The suspected bomber walked into the building disguised as a recruit, an official told Reuters news agency.
Pakistan’s army has recently carried out a major offensive against Taliban militants in the Swat valley. Residents began returning home last month.
Some two million people were displaced when the conflict was at its height. Isolated skirmishes continue.
The explosion targeted recruits for a community police force as they trained near Mingora, the valley’s main town.