Three women were found dead at a home in Hawaiian Gardens on Monday, with two of them in a garage where a car was left running, officials said.
Three deputies who responded to the scene, in the 11800 block of 223rd Street, had to be hospitalized after being overcome by an odor described as "chemical."
Shortly before 7:30 a.m., a relative of the three victims went to the residence and found one of them deceased inside, according to a statement from the Los Angeles County Sheriff's Department.
The victims were two women in their 60s and one woman in her 70s, according to Art Marrujo, a sheriff's dispatch supervisor.
One woman was found dead in a bedroom at the home, Sheriff's Department homicide Lt. Steve Jauch said. Then first responders found the two other women in a detached rear garage.
Three deputies who opened the garage door were "overcome by a strong chemical odor" and were hospitalized, Jauch said. They were expected to be OK.
Inside the garage were the two other victims, on the floor.
Jauch said there were no obvious signs of trauma on the bodies, which were described as those of Asian women.
All three victims were related to one another and were residents of the home, according to the sheriff's news release.
Fire Supervisor Melanie Flores initially said it was a case of possible carbon monoxide poisoning, and Jauch later confirm that a car was running inside the garage where the bodies were found.
Investigators have not ruled out homicide, suicide or accidental death.
Anyone with information about the case was asked to call sheriff’s Homicide Bureau at 323-890-5500. Anonymous tipsters may call 800-222-8477, or text the letters TIPLA plus the tip to 274637, or go to lacrimestoppers.org.
KTLA's Jennifer Thang and John A. Moreno contributed to this article.