Israeli air strikes hit Gaza after Palestinian rocket fire JERUSALEM (Reuters) - Israel carried out air strikes in the Gaza Strip on Monday in response to Palestinian militant rocket fire that broke weeks of relative calm along the frontier. No casualties were reported in the incidents. Six rockets were fired into Israel overnight, causing no damage, police spokesman Micky Rosenfeld said. Two of them were shot down by Israel's Iron Dome missile defense system, the military said. Israeli aircraft later struck targets in the Gaza Strip, including two weapons storage facilities, the military said, and Israel closed one of its the crossings with the coastal territory, which is controlled by the Islamist movement Hamas. No group claimed responsibility for the Palestinian rocket fire. Officials in Gaza said two of six Israeli air strikes struck training camps for the militant group Islamic Jihad. In a separate incident, tires were slashed on 21 cars in the Arab neighborhood of Beit Hanina in East Jerusalem in what appeared to be another in a series of "Price Tag" attacks by suspected Jewish militants. Police opened an investigation. The term refers to the price the militants say they will exact for Palestinian attacks or any Israeli government curbs on Jewish settlement in the occupied West Bank and East Jerusalem. Reporting by Ari Rabinovitch, Editing by Jeffrey Heller