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A security guard was found dead in a Malibu parking lot Tuesday morning after a possible assault overnight, authorities said.

Deputies responded to the 30000 block of Pacific Coast Highway about 7:15 a.m., according to the Los Angeles County Sheriff’s Department.

The call from an employee in the area came in as an unresponsive man surrounded by blood, Lt. Greg Evans told KTLA. He was pronounced dead at the scene.

Though the man had no obvious wounds, the death appeared suspicious, Evans said.

Later, officials at the scene told KTLA the man, described as being in his late 50s, suffered some sort of blunt force trauma to the upper torso. No weapon has been recovered.

The man was wearing a security guard uniform and worked at the location overnight.

Lost Hills sheriff’s station officials tweeted the man may have been assaulted overnight in the parking lot of the Trancas Canyon Nursery.

Aerial video from Sky5 showed the parking lot cordoned off for the investigation.

The scene remained active into Tuesday evening.

Authorities were canvassing the area for possible surveillance video and are hoping to interview any witnesses.

Anyone with information about the death is asked to call the agency’s homicide bureau at 323-890-5500.

Those wishing to remain anonymous can call Crime Stoppers by dialing 800-222-TIPS (8477).