FONTANA (CBSLA.com) — Homicide detectives Thursday investigated the shooting deaths of two men in Fontana.

Officers responded shortly before 9 p.m. Wednesday to the 1700 block of North Heritage Circle near Baseline Avenue for report of gunshots heard in the area, according to the Fontana Police Department.

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Upon their arrival, authorities located two men in a vehicle, suffering from apparent gunshot wounds.

Paramedics pronounced both victims dead at the scene. Their identities are being withheld pending family notification.

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Detectives said the case appears to be a double homicide, not a murder-suicide.

No arrests have been made at this time.

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Anyone with information about the incident has been urged to contact the Fontana Police Department at (909) 350-7740.