WAKEFIELD, N.H. (WPRI) — The victims found dead inside a New Hampshire home on Christmas Day from apparent carbon monoxide exposure have been identified as a Newton, Massachusetts family. Officers were called to a home off Province Lake Road in Wakefield, New Hampshire, to conduct a wellbeing check Wednesday afternoon. Matthew Goldstein, 52, Lyla Goldstein, 54, Valerie Goldstein, 22, and Violet Goldstein, 19, were all found dead inside, according to the New Hampshire State Fire Marshal's Office. BACKGROUND: 4 dead from suspected carbon monoxide poisoning in New Hampshire During a preliminary investigation, officials say the family was supposed to attend a holiday event. When they didn't show up, family members contacted authorities. The medical examiner determined Matthew Goldstein's cause of death was carbon monoxide poisoning, and the manner is pending. The cause and manner of death for the other family members remains pending. No working carbon monoxide alarms were found in the home, according to the Fire Marshal. The cause of the suspected carbon monoxide leak remains under investigation, and officials continue to inspect the home's heating system. Invisible killer: How to prevent carbon monoxide poisoning during the heating season Carbon monoxide is an odorless, colorless gas that, if inhaled, can cause sudden illness or death, according to the U.S. Centers for Disease Control and Prevention (CDC). More than 400 Americans die from carbon monoxide poisoning each year, the CDC said, while more than 100,000 visit the emergency room for treatment. Symptoms of carbon monoxide poisoning come on suddenly and typically include headaches, dizziness, weakness, upset stomach, vomiting, chest pain and confusion. The best way to reduce the risk of carbon monoxide poisoning in your home is to make sure there are working detectors in each bedroom. Here are some tips: Install and maintain carbon monoxide alarms in a central location outside each separate sleeping area, on every level of the home, and in other locations, as required by laws, codes, or standards. If you have combination smoke/carbon monoxide alarms, follow the directions for smoke alarm installation. Test carbon monoxide alarms once a month and replace them if they fail to respond correctly when tested. Replace the carbon monoxide alarm according to manufacturer’s instructions or when the end-of-life signal sounds. Know the difference between the sound of the carbon monoxide alarm and the smoke alarm, and each alarm’s low-battery signals. If the audible low-battery signal sounds, replace the batteries, or replace the device. Carbon monoxide alarms are not substitutes for smoke alarms, and vice versa. Know the difference. Close Thanks for signing up! Watch for us in your inbox. Subscribe Now Daily Roundup SIGN UP NOW