POMONA, Calif.—A man and a woman were killed Sept. 9 in a Pomona shooting.

The shooting was reported at 4:08 a.m. in the 1200 block of South Thomas Street, according to Pomona police Sgt. Jaime Martinez.

Los Angeles County firefighters were already at the scene when officers arrived and pronounced both people dead, Martinez said.

“The motive for the crime is not yet known,” the sergeant said.

“Detectives believe this to be an isolated incident, with no greater threat to the community.”

An investigation by homicide detectives was underway, Ms. Martinez said.

The woman was later identified as Erendira Montes Rocha, 30, of Pomona, according to the Medical Examiner’s office. The man’s name was not yet released.

Suspect information was not immediately available.

Anyone with information was asked to contact the Pomona Police Department at 909-620-2085 or Crime Stoppers at 800-222-8477.