Israel has continued to drop bombs on the Gaza Strip, targeting tunnels used to move weapons into Gaza secretly.
It's the second day of attacks on Gaza. Israel says it will carry on dropping the bombs until people living in Gaza stop firing rockets into Israel.
Palestinians in Gaza say around 280 people have been killed so far, and more than 1,000 may have been hurt.
Governments around the world want Israel to stop its air strikes and the people in Gaza to stop firing rockets.
But Israel seems unlikely to stop the fighting, and is perhaps thinking over sending soldiers and tanks into Gaza on the ground.
Israel says at least 110 rockets have been fired over the weekend.
The United Nations Security Council has said all violence in the region must stop, both from the Israeli military and the people firing rockets.
Gaza is controlled by a group called Hamas and is where lots of Palestinian people live. Recently rockets and bombs have been fired into Israel from Gaza.
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THE GAZA STRIP
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Israel says it has been targeting places in Gaza used by Hamas, to keep its own people safe from the rocket attacks.
Most of those killed were policemen in the Hamas movement, but women and children also died, Gaza officials said.
In Israel, one person was killed, in the town of Netivot, some 20km (12 miles) east of Gaza, while there were reports of several rocket strikes early on Sunday.
Earlier this year Israel and Hamas agreed to stop fighting each other for six months, in something called a ceasefire, but when that ended earlier in December the fighting started again.