Here’s the details from Sheriff’s HQ bureau:

Deputy-Involved Shooting in Rowland Heights, Walnut Sheriff’s Station

Sheriff’s Homicide Bureau investigators are at the 18500 block of Colima Road, Rowland Heights, investigating the circumstances surrounding a Deputy-Involved Shooting.

Homicide Lieutenant Liam Gallagher reports that Walnut Sheriff’s Station deputies responded to an Assault With A Deadly Weapon (Knife) call at about 9:12PM on Friday.

Deputies found a male Hispanic adult suspect stabbing a male Hispanic adult victim. Deputies ordered the suspect to drop the knife, but he continued stabbing the victim. A deputy involved shooting occurred. The suspect was pronounced dead at the scene. The stabbing victim was transported to a local hospital and his condition is not known at this time. No deputies were injured.