At around 1.10pm (9.10pm UK time) officers searching for a suspect found a body in the driver’s seat of a van.
And at a news conference, Los Angeles County Sheriff Robert Luna confirmed the body was that of the gunman.
Sheriff Luna said the suspect, 72-year-old Huu Can Tran, died of a self-inflicted gunshot wound “as officers closed in”.
He said when when officers searched the van they recovered “several pieces of evidence” related to the Monterey Park scene and a second scene in Alhambra.
A handgun was also recovered.
Police had been searching for a suspect since around 10.20pm on Saturday (6.20am UK time) after the gun attack at a ballroom dance studio in Monterey Park – a city just east of Los Angeles.