The cause of the fire is unknown, but the family tells KDKA they believe it is suspicious.By Lindsay Ward

PITTSBURGH (KDKA) — The Allegheny County Fire Marshal is investigating a fire that damaged a home early Tuesday morning in Wilkinsburg.

The fire broke out along Ross Avenue around 4:30 a.m.

KDKA’s Lindsay Ward spoke with a woman who lives inside the home.

She says she heard a boom and then saw flames.

Four people live inside the home, including a pregnant woman. All made it out of the home safely.

A lot of damage was done to the front home on the first floor.

(Photo Credit: Lindsay Ward)

The Red Cross is assisting the displaced family.

The cause of the fire is unknown, but the family tells KDKA they believe it is suspicious.

Stay with KDKA for more on this developing story.