Authorities say a maintenance worker was severely burned in a boiler explosion that prompted evacuation of a Northwest Philadelphia elementary school.
The blast at F.S. Edmonds in the East Mt. Airy neighborhood was reported at about 12:40 p.m. Wednesday.
Police said the boiler in the basement exploded while a maintenance man was working on it. A police spokeswoman said the blast did not appear suspicious.
The 61-year-old worker was taken to Einstein Medical Center with severe burns to his body and listed by medics in critical condition.
No injuries to students or staff were reported.