Long Beach police are investigating the deaths of twin sisters found in their home on Naples Island, one of the city's most affluent neighborhoods.
Los Angeles County coroner officials have identified the women as Valerie Christine Blackler and Diane Carol Blackler, 58 and both nurses.
Coroner officials have ruled Valerie's death as a suicide but have not determined the cause of death for Diane.
Police officers discovered the bodies about 5:50 p.m. Saturday in the 100 block of Syracuse Walk as they were checking on the well-being of the women.
Homicide detectives and coroner investigators were dispatched to the home shortly after the bodies were found, police said.
Long Beach police and coroner officials released no further information about the incident.