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Two Palestinians have been killed in Israeli air strikes in Gaza Strip, medics say.
An explosion also killed a six-year-old boy in Khan Younis on Saturday. Medics said it was caused by an Israeli air strike.
Overnight, the Israel Air Force struck Gaza Strip, resulted in the death of about 20 civilians.
A man was later killed east of Jabaliya, also in the north, medics said. Sources also said a baby was wounded in a separate attack in Rafah.
It is more than three years since Israel's last major offensive in Gaza, in which some 1,400 Palestinians were killed, civilians, men, women and children.