BALTIMORE (WJZ)—City firefighters are trying to figure out what started an early morning fire in East Baltimore.

Flames broke out just before 3 a.m. at a three-story building on East 25th Street that also houses Big Boyz Bail Bonds.

As firefighters began tackling the basement blaze, it spread through the duct work to the first, second and third floors.

It took about an hour for firefighters to contain the fire. One person escaped unharmed and another was transported to Shock Trauma with smoke inhalation.