Three workers were injured in a “possible electrical explosion” at the Medical Center Metro Station in Bethesda on Monday morning, a fire official said.

The incident occurred about 7:45 a.m. and the workers were all hospitalized with injuries that included electrical burns, said Pete Piringer, spokesperson for the Montgomery County Fire and Rescue Service.

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The workers were in or near an electrical shaft adjacent to the station when the incident occurred. The station remained open.