Downtown Baltimore Building Explosion, Likely Caused By Contractors, Injures 23

An explosion in a high-rise building in Baltimore injured 23 people Wednesday and temporarily trapped a window washing crew on dangling scaffolding.

Twenty-one of the victims were brought to area hospitals following the explosion with a partial roof collapse. The city’s fire department tweeted that at least nine of the victims were in critical condition, while another was in serious condition.

The trapped workers were rescued through a window. Firefighters continued to search the building Wednesday afternoon.

The firefighters’ union tweeted that evidence points to an explosion on the 16th floor of the downtown building, where the offices of Baltimore Gas and Electric Company are located.

The fire department said the cause of the explosion remains under investigation. But utility spokeswoman Stephanie Anne Weaver said work on the building’s "air handling and boiler system" likely caused the accident.