Five people have been killed in Israeli air strikes on Gaza, health officials there say, as Palestinian militants continue to fire rockets at Israel.
Violence resumed after the end of a three-day ceasefire on Friday.
Tensions have also been growing in the West Bank where protesters have clashed with Israeli troops. Reports say two Palestinians have been shot dead, one on Friday and one on Saturday.
At least 1,960 people have died since violence erupted in Gaza in early July.
More than 1,900 Palestinians, mostly civilians, have been killed,according to the UN.
Sixty-seven people have died on the Israeli side, including three civilians.
Israel said it renewed its military offensive soon after the truce lapsed in response to rocket fire by the Hamas militant group, which dominates Gaza.
On Saturday, the bodies of three Palestinians were pulled from the wreckage of a mosque in Gaza, local officials said.
Two more people died when their motorcycle was bombed, the authorities added.
There have also been two major explosions in the Gaza Harbour area. A BBC correspondent says one of the blasts is believed to have targeted a Hamas training facility.
The Israel Defense Forces (IDF) earlier said it had struck 33 sites in Gaza on Saturday, while six rockets had hit southern Israel.
More than 70 rockets have been fired from Gaza since the end of the ceasefire, according to the IDF.
The conflict has also caused tensions in the West Bank, the territory governed by Palestinian President Mahmoud Abbas and his Fatah movement.
A Palestinian man died of a gunshot wound during a confrontation with Israeli soldiers in the city of Hebron, health officials said on Saturday.
Earlier, Israeli military officials confirmed that troops had killed a Palestinian man on Friday at a protest near a Jewish settlement outside the town of Ramallah.