CORONA, Calif. -- A man suspected of opening fire during an argument in the freezer section of a Corona Costco, killing one man and wounding two other people, including an off-duty police officer, is in custody.
"There was an OIS (officer-involved shooting) that occurred," said Officer Greg Kraft of the LAPD's Media Relations Section. "He (the off-duty LAPD officer) suffered minor injuries. It was unknown what they were."
The officer was treated and released from an area hospital, Kraft said.
An LAPD use-of-force investigative team was at the scene all night conducting their own investigation, CBS2 reported. Witnesses at the scene told CBS2 that they heard an argument before hearing seven or eight shots.
"We have initiated an administrative investigation, to where we're working with the Corona Police Department," Kraft said.
The off-duty LAPD officer was assigned to the department's Southwest Station.
Officers responded to a shots-fired call at the store, located at 480 N. McKinley St., at 7:45 p.m. Friday and anticipated an active-shooter situation, according to Lt. Jeff Edwards of the Corona Police Department.
"They went inside and encountered four subjects down," Edwards said.
One man was dead at the scene, two adults had suffered gunshot wounds and the suspected shooter was detained, he said.
The injured victims were taken to a hospital in unknown condition and the suspect complained of pain and was also taken to a hospital, Edwards said.
Witnesses told police there was an argument between a man with a Mohawk haircut and another man in the freezer section of the store before at least six shots were fired, KCAL9 reported.
Most customers ran out of the store when the gunfire erupted.
Former U.S. Marine Aurtis Wilson told the Press-Enterprise he heard two people arguing near the store's produce section, then heard gunshots. He said he saw the shooter firing at several people as he, his wife and daughter ran out of the store.
The names of the victims and suspect were not released.
Personal items belonging to shoppers who fled the store, including purses, cell phones and backpacks, were secured by officers, police said in a statement Saturday morning.
"The items will be kept for safekeeping and will be released to the owner with proper identification," the statement said.
Customers who left shopping bags or other items of interest need to contact Costco at 951-279-1190 to retrieve their property.
Anyone who witnessed the shooting or has information about it was asked to contact Corona Police Lt. Robert Newman at 951-817-5788 or via email at Robert.Newman@CoronaCA.gov.
The store was not open to the public for its normal hours Saturday morning, according to the Press-Enterprise.