Investigators say a house fire that killed two brothers in Orono Sunday started in the chimney. 49-year-old Cris Davis of Milford and his 47-year-old brother, Randy Davis, were found inside the house on Hillside Road. The fire was discovered around 3 a.m. Authorities believe Randy Davis owned the home.Investigators say the two brothers and a friend were out drinking Saturday night and they took a taxi home.Initially investigators were searching for the friend, too, but he was found at his apartment mid-Sunday morning.The Orono Fire Department says they had the fire out in about 45 minutes upon arrival. Orono Fire Lt. Scott Luciano says, “It had to do with the fire and how it was noticed. It was noticed by the Orono Police Department. So we’re not really sure how long it had been building before it was noticed.”State Fire Marshal Joe Thomas says, “With in 6 weeks we’ve had 6 fatalities in this state and a big indication is they didn’t have working smoke detectors. Now that’s 6 people accounted for in relationship to some detectors in their homes. People have got to pay attention to this word they we’re talking about. For the value of the some detectors and their ability to get out of these buildings when they have a problem or a fire.” This was the second deadly fire in greater Bangor area in the past two months where smoke detectors weren’t in the home or weren’t working.The bodies are still being examined by the State Medical Examiner to determine how the men died.