Arson investigators now say a morning blaze at a central Arlington apartment complex Thursday was intentionally set.
The 9 a.m. fire damaged three units at the Stone Ridge Apartments at 504 Travis Court, south of east Arkansas Lane and west of south Collins Street.
Investigators do not have a motive and have not said how the fire was started, said Deputy Fire Marshal Darin Niederhaus.
Arson investigators were still interviewing witnesses Thursday afternoon.
Witnesses at the scene said they saw someone running from the area of the apartment shortly before the fire.