At least 48 cadets and guards have been killed after militants attacked a police college in the Pakistani city of Quetta, officials say.
A major security operation lasted for hours after the attackers entered the building and opened fire.
Officials say three militants wearing suicide bomb vests stormed the college – all three were killed.
Hundreds of trainees were evacuated from Balochistan Police College as troops arrived to repel the militants.
In August, 88 people were killed in separate bomb attacks targeting a hospital and lawyers in Quetta.
The Pakistani military has been conducting military operations against militants in volatile tribal areas near the Afghan border.