EAST LIBERTY (KDKA)- Arson investigators say someone intentionally set a fire early Friday morning in East Liberty.
Investigators say the family was airing out a mattress and box springs on the back porch.
That’s when someone intentionally lit the mattress and box springs on fire.
It happened just after midnight at a home in the 5100-block of East Liberty Boulevard.
The fire spread through a window into the house. It was quickly put out after crews arrived.
Everyone inside the duplex was able to get out safely.
A family of four on one side of the duplex is being helped by the Red Cross.
The people who live on the other side will be allowed to stay.
So far, nobody has been arrested in the case.