Sirhan Sirhan at his 10th parole hearing in 1997. REUTERS

Officials returned Sirhan Sirhan to prison Sunday after his Friday stabbing at the Richard J. Donovan Correctional Facility, according to news reports.

ABC News reported Sunday that Sirhan, the assassin of Sen. Robert F. Kennedy, left the hospital. The report cited Sirhan’s New York lawyer Laurie Dusek and his brother Munir Sirhan, of Pasadena.

The California Department of Corrections and Rehabilitation confirmed an assault on an inmate at 2:21 p.m. Friday. Officials found the inmate, believed to be Sirhan, with wounds and transported him from the Otay Mesa prison to a hospital.

Officials placed the alleged perpetrator – they did not release his name – in the prison’s Administrative Segregation Unit, pending an investigation.

A jury convicted Sirhan, now 75, a year after he killed Kennedy as the candidate addressed supporters in Los Angeles after winning the 1968 California presidential primary.

The California Supreme Court ruled in 1972 that capital punishment violated the state Constitution’s prohibition against cruel and unusual punishment. The decision reduced Sirhan’s death sentence to life in prison.

– City News Service