Dallas firefighters responded to a three-alarm fire early this morning at the Arbor Park Apartments in northeast Dallas. The fire started in the patio area of a first floor apartment unit. It quickly traveled to the 2nd and 3rd floors and into the attic. Four units suffered fire damage and three families were displaced. Red Cross will assist those individuals affected by this fire. Estimated damages are at a total amount of $80,000. No injuries resulted from this fire. Fire investigators have not yet determined a cause.