Photo via Baltimore County Fire Department/Twitter

Two contractors and a child were injured at Owings Millsโ€™ McDonogh School after an explosion in the schoolโ€™s boiler room that partially collapsed a smokestack, school officials said this morning.

A statement released by the school around noon said the student โ€œsustained a minor injury,โ€ and was released from a local hospital after an evaluation.

Two outside contractors also suffered minor injuries, and one was transported to a hospital for an evaluation, the school said.

The note said โ€œall students, faculty, and staff are safe.โ€ School dismissed early at 11 a.m. after the incident, and all afternoon activities there are cancelled.

The blast caused the top of a smokestack connected to the boiler room to crumble, sending bricks falling to the ground. The smoke tower sits adjacent to the Allan Building, and school officials said the area โ€œhas been cordoned off.โ€

Fire department crews were at the campus investigating Wednesday morning, including a collapse team evaluating the stability of the tower. Officials asked drivers to avoid McDonogh Road while teams were responding.

Units were dispatched to the private school just after 8:30 a.m. A photo later posted by the department showed the damaged top of the smokestack.

Update, #McDonogh school explosion, #OwingsMills: 1 adult and 1 child transported w non life threatening injuries. Explosion damaged the shot tower, a smokestack for the boiler room. EA pic.twitter.com/6UJItHtVKy

โ€” Baltimore County Fire Department (@BaltCoFire) September 18, 2019

A school spokeswoman reportedly notified parents about 20 minutes later that the explosion had occurred in the boiler room.

Per its website, the Allan Building houses administrative offices, the schoolโ€™s business office, its technology department, the counseling office, music studios, choral music space, the Upper Schoolโ€™s humanities department and a library. It was built in 1929 and was recently renovated.

The school said it contacted a structural engineer today โ€œto assess the building and ensure that the surrounding area is safe.โ€

This story has been updated.

Ethan McLeod is a freelance reporter in Baltimore. He previously worked as an editor for the Baltimore Business Journal and Baltimore Fishbowl. His work has appeared in Bloomberg CityLab, Next City and...