Two Israelis were injured, one seriously, when a Grad rocket fired by militants in Gaza slammed into the coastal town of Ashdod in southern Israel early on Friday, police said.
"One person was seriously wounded in the attack, and another person was lightly hurt," police spokeswoman Luba Samri told AFP, saying two rockets had hit the town. The second caused no damage or injuries, she said.
The Israeli military confirmed the strike saying a school and a synagogue had been damaged in the attack.
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"Two rockets fired at the city of Ashdod caused damage and injuries at a synagogue and school," a statement said.
The latest firings raised to 12 the total number of rockets fired from Gaza into southern Israel since midnight, the military said.
The increased rocket fire came a day after militants Israel said were from Gaza staged a coordinated series of attacks on a desert road near the Red Sea resort town of Eilat, killing eight Israelis.
The air force hit back, striking targets across the strip which killed seven Palestinians, at least four of them senior militants from the Popular Resistance Committees, the group Israel says was behind Thursday's bloodshed.
The group immediately vowed to exact a bitter price for the killing of its leader and other senior cadres.