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.
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Witnesses at the scene said they saw someone running from the area of the apartment shortly before the fire.