Authorities were on Monday investigating a fatal shooting in an Israeli prison after a US-Israeli inmate was gunned down by guards after opening fire with a smuggled weapon.
The Israel Prison Services said it was looking into Sunday's incident, during which Samuel Sheinbein shot at guards apparently using a gun he had smuggled into Rimonim prison, north of Tel Aviv.
Three wardens were wounded, two of them seriously, as well as one prisoner.
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Sheinbein, 34, was eventually killed by the prison's anti-riot unit.
Police had also formed an investigative committee to investigate the incident, spokesman Micky Rosenfeld told AFP.
Sheinbein was sentenced by an Israeli court to 24 years in jail for the gruesome murder and dismembering of acquaintance Alfredo Enrique Tello in the United States in 1997, when he was 17 years old.
He had fled to Israel to escape justice, and the Jewish state refused to extradite him because he was an Israeli citizen by birth through his father, in legal wrangling that caused outrage in the US.
Following Sheinbein's case, the Israeli parliament passed a law which allows for Israeli nationals to be extradited.