COVINA (CBSLA) — A Covina couple who died in what police said was an apparent murder-suicide were identified Friday.

Officers were dispatched to the 200 block of East Center Street about 4:45 p.m. Wednesday in response to a “sounds of an argument and shots fired” call.

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Once inside, authorities found the couple — grandparents who had legal guardianship of three of their young grandchildren  — dead inside a locked bedroom, said the Covina Police Department.

The coroner’s office identified the deceased as Michael Rivera, 62, and Monica Dominguez, 52.

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Police believe Rivera shot and killed Dominguez, then turned the gun on himself.

The three young children also lived at the location. “The juveniles were found safe at a neighbor’s residence,” says Covina Police Sgt. David Rodriguez.

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A handgun was recovered at the scene.