Israeli police say an American-Israeli prisoner killed in a shootout with prison guards had fired a weapon that was smuggled into jail.
Police initially said that inmate Samuel Sheinbein stole a gun from one of his guards before special forces shot him dead on Sunday.
But police said the inmate apparently smuggled the gun into jail. A spokeswoman said the matter is being investigated.
Sheinbein, who was 34, fled from the US to Israel after murdering and dismembering a Maryland man in 1997. His case sparked a high-profile row between the allies after he received refuge from extradition.