Authorities in Bridgeport are investigating three cars that caught fire in a parking garage last night as possible cases of arson. Fire officials say the incidents happened at the Embassy Towers on Park Avenue. They say they put out a small fire inside a car on the lower level, and were then called back for two other car fires. An arsonist is believed to responsible since the fires took place on separate floors. Some residents were evacuated from the 15-story building and forced to stay outside until the area was properly ventilated. Police say they questioned a man with burns on his hands, but did not arrest him.To watch extended footage from the Bridgeport garage fire, click on iO Extra on Channel 612.