Four people have died from suspected carbon monoxide poisoning in a New Hampshire residence, according to officials who reported that the victims were found dead on Christmas. The Wakefield, N.H. Police Department responded to 2962 Province Lake Road for a welfare check at around 4:21 p.m. on Wednesday.

In October, two people were killed by carbon monoxide in Bedford, N.H., about 50 miles south of Wakefield. An elderly couple, 78-year-old David P. Moore Jr. and 79-year-old Janice G. Moore, were identified as the victims.

Carbon monoxide is an odorless, colorless, and tasteless gas, and it is deadly. The gas is produced by the incomplete burning of various fuels.