The death toll from a fire early Tuesday at the prison in the southwestern Colombian city of Tulua has risen to 51 after two injured people died at medical centers, officials said.

Gen. Tito Castellanos, director of the National Penitentiary and Prison Institute (Inpec), the Colombian government agency that manages the nation's correctional system, told Caracol Radio that most of the deaths were caused by smoke inhalation.

The Technical Investigative Corps, a unit of the federal Attorney General's Office, is in the process of identifying the bodies, he added.

An initial bulletin said 49 inmates had died and 30 others who were injured had been taken to different Valle del Cauca regional hospitals.

The general did not provide any information on the prison guards who, according to initial reports, were affected by the fire.