Updated

Authorities say four people have been found dead inside a Southern California home following what investigators believe might have been a murder-suicide.

KNBC-TV reports (http://bit.ly/1jHJRJZ) officers arriving at the home in Pomona late Thursday discovered the bodies of two males and two females.

Pomona police say they were contacted by family members who were concerned about the welfare of their relatives at the residence.

Officials say homicide detectives are investigating the incident as a possible murder-suicide.

Pomona is a city of about 150,000 people 30 miles east of downtown Los Angeles.

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Information from: KNBC-TV, http://www.nbc4.tv/