MARIETTA, Pa. - A brand new high school under construction in central Pennsylvania has been severely damaged by fire.

The blaze at the new Donegal High School in Lancaster County began shortly before 8 p.m. Thursday and quickly went to a second alarm.

The first crews arrived on the scene to find smoke pouring from the roof of the building.

At least 20 fire trucks from seven fire companies in the area responded to the scene. Firefighters said late Thursday night that the blaze was under control.

The Donegal School District Superintendent Sherry Riedel said the school was set to open in the fall but that could be delayed because of the heavy water and smoke damage.

The cause of the fire wasn't immediately known. No injuries have been reported.