Israeli police say they have arrested five Israeli Arabs on suspicion the men were conspiring to kidnap soldiers and border police and use their weapons to attack Jews.
Police spokesman Micky Rosenfeld says the five are from the northern town of Daburieh.
He says they claim to belong to an Islamic holy war group called Salfiya Jihadiya _ an obscure, fundamentalist group.
Rosenfeld says the suspects had identified potential targets and tried to find work in Israeli government offices and strategic facilities from where they were to carry out their attacks.
Rosenfeld says the five were arrested in September and will be indicted later on Thursday.
The Yediot Ahronot newspaper says the five are between 19 to 24 years old.