Authorities in New York City say an alleged serial killer has killed more than 40 people and wounded dozens of others by putting their bodies in carbon monosulfate gas cylinders at a nursing home.
The facility in Roseland, Queens, has been at the center of a monthslong investigation into the death of dozens of residents and residents’ relatives.
Officials say the bodies of the dead were discovered in the basement of the facility on April 14.
Investigators say they believe there are more bodies inside the facility.
The victims were identified as 59-year-old Barbara Gwynne and her 56-year old daughter, Barbara, according to the Nassau County Medical Examiner’s office.
The deaths were initially ruled accidental, but then the authorities began looking into the deaths of at least 40 other people, the medical examiner’s office said in a statement.
The deaths have been linked to a serial killer who has also been found dead in a home near the facility, it said.
Authorities believe the deaths were triggered by carbon monotone leak.
Carbon monoxide is a byproduct of coal combustion that can cause breathing problems.
Carbon monoxide can cause respiratory problems, such as shortness of breath and headaches.
It can also trigger other health problems, including headaches, vomiting, and skin irritation, according a news release.
The investigation also found that a man had been in a fight with another resident when he died in a gas cylinder explosion, according the release.
Investigators said it appears the man was not the first person to die at the nursing home in recent months.
In January, a nursing assistant died when her car exploded while she was cleaning out a unit, authorities said.