Egypt's prime minister has condemned Israeli attacks on Gaza as a "disaster" during a short visit to the territory.
Hisham Qandil, who went to a hospital and talked to Hamas political leaders during his three-hour visit, said Israel's "aggression" must stop.
The Israeli military struck at more than 130 targets overnight and militants fired 11 rockets from Gaza.
At least 20 Palestinians and three Israelis have been killed since Israel began its offensive on Wednesday.
Militants and civilians, including at least five children, were among the Palestinian dead, Palestinian officials said.