In order to thwart attempts by terrorists to tunnel from Gaza into Israel, the Israeli government has an underground wall along the border. On 18 June, Gaza terrorists blew themselves up trying to destroy the underground barrier. The incident occurred after an escalation of rocket fire and firebomb-laden kites and balloons sent from Gaza into southern Israel. Defence minister Avigdor Lieberman warned that Israel would not allow Gazans to continue launching incendiary devices into Israeli territory, which have caused hundreds of brush fires and burned thousands of acres of land. ‘If anyone thinks it will be possible to continue with the daily kites and fires, they are wrong,’ Lieberman said. Meanwhile housing minister Yoav Galant said, ‘When an eight-year-old boy flies a kite strapped with a firebomb because someone told him to, it is problematic to send a drone to shoot him dead.’