Israel's High Court has refused to lift a ban preventing Mordechai Vanunu from leaving the country.
The restriction was imposed on the nuclear weapons programme whistleblower when he was freed after an 18-year prison term.
The Israeli government says Mr Vanunu, a former nuclear technician, is a security risk.
Mr Vanunu was released in April, and has insisted he has nothing more to tell and that the travel ban violates his civil rights.
