Several Tyler families are without a home Sunday after their apartment buildings go up in flames. Firefighters were called out to 520 South Augusta around 7:00 a.m., Sunday. When they got there they learned the fire had spread to the apartment building next door at 521 South Bonner. Firefighters say the buildings were already in flames when they arrived. Around six units suffered heat and smoke damage. The cause of the fire is still under investigation, but firefighters say they have not ruled out arson. Fortunately, there were no reports of any injuries.