DOWNEY, Calif. (AP) — The Latest on a lockdown at a Los Angeles-area hospital (all times local):

12:55 a.m.

Authorities say there are no injuries following reports of a possible active shooter at a Los Angeles-area hospital.

Los Angeles County sheriff's officials say a suspect is in custody and deputies and police officers are searching Kaiser Permanente Downey Medical Center on Tuesday.

Part of one building at the sprawling hospital has been evacuated and the rest is under lockdown.

It's unclear if there was actually a shooting.

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12:45 p.m.

An employee at a Los Angeles-area hospital says he heard reports there was someone with a weapon before the facility was locked down.

Los Angeles County sheriff's officials say a suspect is in custody and deputies and police officers are methodically searching Kaiser Permanente Downey Medical Center.

Officials initially said there was a report of a possible active shooter. It's unclear if there was actually a shooting.

Employee Edwin Olvera tells The Associated Press that he heard someone might have been robbed outside his office. He says the building is locked down and he's "never been more afraid."

TV news helicopters show people calmly exiting the hospital and a heavy police response.

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12:25 p.m.

Authorities say a suspect has been detained after reports of a possible active shooter at a hospital near Los Angeles.

The Los Angeles County Sheriff's Department says Tuesday that it's unclear if there are any victims or any other suspects at Kaiser Permanente Downey Medical Center.

The department says deputies and Downey police officers are searching the building room by room.

TV helicopters are showing people calmly walking out of the facility and numerous police vehicles around it.

Downey is a city of about 110,000 people southeast of downtown Los Angeles.