Firefighters are investigating two suspicious fires in south Dallas.
A man who lives on Birmingham Avenue said he heard a loud bang before smelling smoke in his home around 2 a.m. Thursday.
As firefighters were putting out the flames, they got a call about a house fire a few blocks away.
Investigators believe the second fire in a vacant home on Lenway Street was started by a Molotov cocktail.
They are trying to determine if the two fires are linked.
No one was hurt in either fire.