Hamas leader Ismail Haniyeh said his group taught a lesson to Israel with the current escalation of violence near the Gaza border, and "the occupation got the message."His comments on Wednesday were carried by the Associated Press. A senior Israeli political source carried in Israeli media said Haniyeh should "find a new office" before issuing threats."The resistance said its piece and Israel got the message. I congratulate everyone who helped end the Zionist arrogance in the Gaza Strip," he said. "We will restore the leadership's headquarters, which is a symbol of steadfastness and heroism. I call on all the Palestinian people... to go out on Land Day and participate in the marches."Incoming rocket sirens were activated Tuesday night shortly after Israeli Air Force struck targets in the Hamas-run Gaza Strip.Israeli fighter jets struck several targets in the southern Gazan city of Khan Younis, including a military compound and a weapons manufacturing site belonging to Hamas, the military said.The attack was carried out in response to the launching of a rocket from the Gaza Strip into Israeli territory and the launching of incendiary and explosive balloons.Moments after airstrikes, a rocket was fired from Gaza towards the industrial park south of the city of Ashkelon, the army said.Anna Ahronheim contributed to this report.