PM is suspected of furthering interests for associates of his close friend, attorney Uri Messer.
Should the tank suffer a direct hit, a toxic ammonia cloud could endanger anyone within a 5.5 kilometer radius.
Home Front chief lifted curbs on use of toxic ammonia tank, vulnerable to rocket fire during war.
Senior Israel Antiquities Authority archaeologist in charge of Ashkelon excavations owns quarter of excavations company shares.
Foreign convicts say they may be used as bargaining cards in prison riots that have claimed 170 lives.