Authorities are investigating after four men were found dead in a Palmdale, California home Jan. 16.

Los Angeles Sheriff’s Department deputies responded to a call around 7 p.m. to 17th Street East and found two men outside the home and two men inside—all unconscious. All were ultimately declared dead at the scene.

Authorities said their initial investigation led them to believe there was narcotic use in the home. They additionally said there was no threat to the public.

The Los Angeles County medical examiner’s office Jan. 16 identified one of the men as Thomas Lee Ramsey Jr., 35, of Los Angeles.

The names of the three others have not been released, but they were identified as a man in his 60s, and two men in their 30s.