Authorities on Saturday were searching for an individual they said fatally shot a man at an Ontario home.
Officers responded to a report of shots fired just after midnight at a residence in the 300 block of Carlton Street, Sgt. Bill Russell with the Ontario Police Department said.
Police discovered the body of a man in his 30s shot multiple times at the front porch, Russell said.
The agency later released a statement saying the victim had an apparent gun shot wound.
Ontario fire paramedics pronounced the man dead at the scene.
Investigators believed the victim had been involved with an argument with the shooter, possibly a man he knew who was visiting the home. There were some 10 people who might have seen or heard what happened, Russell said.
The officer said although several people were gathered at the property, it did not seem like there had been a party.
A woman at the scene said she called 911 after hearing two gunshots from the porch of the residence. She told KTLA there were four or five people, who were roommates, at the house at the time of the incident. Detectives were still investigating who lived at the home.
Police said they have not recovered a weapon nor have they identified the shooter, who fled the scene before officers arrived. The victim's name has not been released.
Authorities provided no further details.
Anyone with information call Detective Robert Marquez at 909-395-2777 or 909-986-6711. Those who wish to remain anonymous can call 800-78-CRIME or visit wetip.com.