An off-duty San Bernardino County Sheriff’s Department deputy fatally shot his brother, an allegedly knife-wielding parolee who attacked relatives during a family gathering in Bloomington on Saturday, April 6, officials said Sunday.

Deputies responded at about 9:12 p.m. to reports of a shooting at a residence on the 9800 block of Magnolia Street, near Marygold Avenue, according to a news release from the San Bernardino County Sheriff’s Department. There, authorities found a man suffering from multiple gunshot wounds who was taken to Arrowhead Regional Medical Center and later pronounced dead.

He was identified as Israel Miranda Jr., 28, of Bloomington in the Sheriff’s Department’s release. It said the man was shot by his brother, Humberto Miranda, 26, of Fontana, a San Bernardino County Sheriff’s deputy assigned to the Victorville station who was off-duty at the time.

Investigators believe an argument broke out in the front yard of the home, and that Israel Miranda allegedly attacked several of his family members with a knife. A brother, Sergio Miranda, 24, of Bloomington, suffered a laceration to his hand but declined medical treatment, said the release. It described Israel Miranda as a parolee with a history of violence.

The news release named Israel Miranda as the suspect in the incident described as an attempted murder/homicide investigation. Sergio Miranda and Humberto Miranda were described as victims and were not arrested.

Investigative information on the incident will be submitted to the San Bernardino County District Attorney’s office for review.