An operation is underway Thursday by the Los Angeles Police Department to make arrests in the murder of "General Hospital" actor Johnny Wactor, multiple law enforcement sources told ABC News.

Wactor was shot "without provocation" around 3:25 a.m. on May 25, after he ended his shift at a bar and walked to his car, according to police.

He was confronted by three people who had his car "raised up with a floor jack and were in the process of stealing the catalytic converter," police said in a statement.

This is a developing story. Please check back for updates.