NEW : Australian network says ' Prisoner X ' shared Israeli secrets with him . Pressed for answers by another lawmaker , Justice Minister Yaakov Neeman said that the matter should be investigated . The man died in an Israeli cell in December 2016 ; details have not been released . Israeli lawmakers say they 're investigating the death . Netanyahu warns against ` ` leaking '' of intelligence reports .
NEW : Australian network says ' Prisoner X ' shared Israeli secrets with him . The man died in an Israeli cell in December 2016 ; details have not been released . Israeli lawmakers say they 're investigating the death . Netanyahu warns against ` ` leaking '' of intelligence reports .