A Baltimore County lieutenant called a Mayday Tuesday night after part of a ceiling fell on him while battling a store fire.
He suffered a non-life-threatening injury, and was released from a hospital, WJZ reported.
Firefighters called for additional alarms to bring manpower to help extinguish the fire at the Advance Auto Parts store on Reisterstown Road.
Baltimore County Police announced late Wednesday morning that a suspect was in custody.
They did not say if the fire was related to an armed robbery at a nearby Royal Farms store that occurred just minutes before.
