State Police are responding to reports a gunman fired on a Millis cruiser Wednesday afternoon. Shots were fired at a Millis Police cruiser Wednesday afternoon, the Massachusetts State Police announced. A gunman reportedly fired at the cruiser on a Millis street just before 3 p.m. Police officials say the cruiser caught fire after being shot at. The incident is reported to have happened on Forest Road in Millis. Additionally, the Millis Public Library is closed due to the investigation. Millis Police, Millis Fire and the State Police Air Wing are responding. There is no word yet on any potential injuries.