An electrical fire shut down power at Prince George’s Hospital Center in Cheverly Thursday night, forcing the hospital to use emergency generators and to stop taking in new patients from ambulances, county fire officials said.

No injuries were reported and the hospital was not evacuated. Firefighters found three transformers ablaze in a boiler room on the hospital’s campus power plant in the 3000 block of Hospital Drive about 8 p.m., said Asst. Fire Chief Alicia Francis.

Pepco cut power to the area, but emergency generators allowed all hospital equipment to function in all areas of the hospital, Francis said. Officials diverted ambulance service from the hospital, she said.

The fire was contained to the boiler room and was extinguished within an hour. The cause of the fire was being investigated late Thursday.