Some 200 trainees were stationed at the facility when the attack occurred late on October 24, officials said, and some were taken hostage during the attack which lasted five hours.
"Forty eight bodies have been brought to the hospital," said Wasim Beg, senior doctor at Quetta's Civil Hospital.
Most of the dead were police cadets.
Mir Sarfaraz Bugti, home minister of Baluchistan province, of which Quetta is the capital, had confirmed early on October 25 that five to six gunmen had attacked a dormitory inside the training facility while cadets rested and slept.
No group immediately claimed responsibility for the attack, but one of the top military commanders in Baluchistan, General Sher Afgun, told media that calls intercepted between the attackers and their handlers suggested they were from the sectarian militant group, Lashkar-e-Jhangvi.