Eyewitness News was on the scene around 1:00 this morning as crews were called to the 400 block of Linwood Avenue.
Fire investigators tell us heavy smoke and flames were coming from a vacant home when they arrived.
The fire spread to a house next door where four people were inside.
Fortunately, we're told they were able to get out safely.
Neighbors say they saw people inside the vacant home earlier in the evening.
That house sustained extensive damage.
We're told the damage to the neighboring home was confined to the attic.