Arson is suspected in a three-alarm fire that heavily damaged the Penn Wood High School in Lansdowne overnight and may force it to remain closed for the rest of the academic year, authorities said.
The blaze followed a series of bomb threats at the school that stopped about two weeks ago, said Fire Chief Daniel Kortan.
Noting a back door had been punched in overnight and that fire burned in multiple locations, Kortan declared the blaze suspicious and local, county and state fire marshals were called in to investigate.
Joe Otto, the William Penn School District's chief operating officer, said the school's 700 junior and seniors may not be able to finish the school year in the building. The district's ninth and 10th graders are housed in another building.