Updated

Sirhan Sirhan, the man convicted of assassinating Robert F. Kennedy in 1968, has been hospitalized after being stabbed in a San Diego prison Friday afternoon.

California corrections officials did not identify Sirhan, 75, as the victim, but a source confirmed to the Associated Press that it was the man serving a life sentence in connection with the death of Kennedy, a U.S. senator from New York who was slain at the Ambassador Hotel in Los Angeles after winning the 1968 Democratic presidential primary in California.

Sirhan was said to be in stable condition after the attack. Circumstances that led to the stabbing were not immediately known.

RFK GRANDDAUGHTER SAOIRSE KENNEDY HILL, 22, FOUND DEAD AT FAMILY COMPOUND

Sirhan Sirhan is shown in this handout photo taken February 9, 2016, and provided by the California Department of Corrections and Rehabilitation. Sirhan, the assassin of Democratic presidential candidate Robert Kennedy in 1968, faces a California parole board for the 15th time on Wednesday.   REUTERS/California Department of Corrections and Rehabilitation/Handout via Reuters ATTENTION EDITORS -  FOR EDITORIAL USE ONLY. NOT FOR SALE FOR MARKETING OR ADVERTISING CAMPAIGNS - TM3EC2A15M201

Sirhan Sirhan was convicted of assassinating Democratic presidential candidate Robert Kennedy in 1968. (Reuters)

"The suspect in the attack has been identified, and has placed in the prison's Administrative Segregation Unit, pending an investigation," the California Department of Corrections and Rehabilitation said, according to KABC-TV of Los Angeles.

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He was originally sentenced to death but when California briefly outlawed the death penalty his sentence was commuted to life in prison.

He is being held at the Richard J. Donovan Correctional Facility.

This is a developing story. Check back for updates. The Associated Press contributed to this report.