Hamas said it fired a barrage of rockets Wednesday towards central and southern Israel, where rescue workers reported one of them killed a six-year-old boy.
The militants said in a statement that it launched 130 rockets in response to an Israeli air raid that levelled the Al-Sharouk tower in Gaza City.
AFP reporters and the Israeli army confirmed sirens were sounding in several southern communities and the Tel Aviv area.
Various locations in Israel's south were hit by a number of rockets, resulting in wounds and a death, medics said.
"A six-year-old boy was killed when a rocket fired from Gaza struck a residential building in Sderot," United Hatzalah said.
Magen David Adom medics said they were treating six others in Sderot, as well as in coastal city Ashkelon.
The Al-Sharouk tower, which housed the bureau of the Al-Aqsa television channel, is the third tall structure levelled by Israeli fire since the bombing campaign began on Monday.
Gaza militants have launched more than 1,000 rockets since Monday, according to Israel's army, which has carried out hundreds of airstrikes on Islamist groups in the crowded coastal enclave of Gaza.
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