AUBURN, Mass. — A Massachusetts family of four was identified as the victims of suspected carbon monoxide poisoning. The family from Newton was found dead at their lake house in New Hampshire on Christmas Day.

New Hampshire’s Office of the Chief Medical Examiner completed an autopsy of Matthew Goldstein and found his cause of death was carbon monoxide poisoning. Autopsies have yet to be completed for Lyla Goldstein and their two daughters.

New Hampshire's fire marshal said there were no working carbon monoxide alarms found in the home and he's urging residents to install and maintain the alarms.

In a separate interview about carbon monoxide awareness, Capt. Shawn Steele of the Auburn, MA Fire Department said people can be exposed to carbon monoxide without warning if the proper detectors aren't in place.

"Colorless, odorless, tasteless. So in other words, we can't detect it. We don't know if it's in the air. It could be in the air right now, but at a low concentration," Steele said. "We have carbon monoxide detectors for a reason. Much like smoke detectors, it's important that you make sure they're they're operating correctly, there's good batteries in them, check those. You know what we say, when you turn your clocks ahead: check all the batteries in your smoke detectors; CO detectors as well."

Steele said if your CO detectors are more than five to seven years old, it's recommended you replace them.

The Centers for Disease Control and Prevention describe carbon monoxide as a colorless, odorless gas which can kill without warning. The CDC said more than 400 Americans die each year from unintentional carbon monoxide poisoning not linked to fires, while another 14,000 are hospitalized.