Abuyog Deputy fire chief Junrey Ong said there were fatalities in the fire but they could not determine how many as of 11 p.m. because the fire had not been put out.
But based on the head count, he added at least 14 inmates were missing. He, however, said they had not received reports that some inmates escaped during the fire.
The fire hit the maximum security building composed of nine cells, with more than 1,500 prisoners.
One said the firefighters from the towns of Mahaplag, Tanauan, Sogod and Hinunangan as well as Tacloban City were helping to put out the fire.
Investigation would be conducted to determine the cause the fire in the maximum security building inside the prison colony located in Barangay Mahagna, about 20 km away from the town proper of Abuyog.
Local police and soldiers were deployed inside the facility.
Those who survived the fire incident were brought to the medium security building which is about 700 meters away from the burning building.
There are seven buildings inside the only penal colony in Eastern Visayas. TVJ