The incident was reported shortly before 11:30 p.m. at a house in the 100 block of East Home Street, where a female caller said her brother was armed with a knife and creating a disturbance, the Rialto Police Department said in a statement.
"While on the phone with dispatchers, the female stated the suspect was now at her bedroom door," the news release said.
Officers arrived at the scene and were approaching the front door when the man, later identified as Christopher Gutierrez, came out of the house through the front door.
Armed with the knife, Gutierrez "charged" at one of the officers, who then opened fire, the statement said.
Gutierrez was transported to a hospital, where he was pronounced dead.
DEVELOPING: More details will be added to this report as they become available.