In the latest violence, an Israeli aircraft fired a missile after nightfall on Wednesday at a group of resistance fighters near Bait Lahya in the northern part of the Gaza Strip, killing one person.
Hamas officials said he was Hassan Shakfi, 24, a member of the Palestinian resistance group.
Rescue workers said another Hamas fighter was seriously wounded.
The Israeli military said soldiers spotted an armed Palestinian and targeted him.
Around the same time, an Israeli helicopter fired a missile into the Rafah refugee camp at the other end of the Gaza Strip, along the Egyptian border.
No one was hurt. About 20 tanks were seen massing at the edge of the camp.
The missile strike followed one earlier in the day which killed another Hamas member and wounded three others.
Palestinian medics said Muhammad Marus was killed when an Israeli helicopter fired a missile into a house in Bait Lahya in northern Gaza.
Also on Wednesday, Palestinian teenager Jihad Barhoum, 16, was shot dead and two others were wounded by Israeli army gunfire in the Rafah refugee camp of southern Gaza, Palestinian medical sources said.
Another Palestinian wounded by Israeli tank fire in the Gaza Strip on Sunday died of his injuries on Wednesday, hospital sources said.
Jihad Musa, 37, had been seriously wounded by shrapnel in the Jabalya refugee camp.
His death raised to 119 the total number of Palestinians killed in Gaza since the massive attack launched two weeks ago by Tel Aviv, which it says is to stop Palestinian resistance fighters launching rockets into Israeli towns and settlements.
Ghadir Mukhaimar, 10, died after
being hit in school by Israeli fire
Many of the dead and injured have been civilians.
Thousands of mourners took part in the funeral of a Palestinian schoolgirl who died on Wednesday after she was hit by Israeli gunfire as she sat inside a United Nations school in Gaza.
Ghadir Mukhaimar, 10, succumbed to wounds received on Tuesday and was buried in the town of Khan Yunus.
In the West Bank, senior Hamas official Imad al-Qawasma was arrested in the city of Hebron, Palestinian sources said.
Tel Aviv accused him of carrying out operations against Israel.
In Jalbun village, east of Jenin, Israeli occupation forces demolished the house of Iyad Muhammed Abu al-Rab, leader of Islamic Jihad's military wing, al-Quds Brigades.
Abu al-Rab has been pursued by Israel for more than a year, Aljazeera's correspondent in the occupied territories said.
Israeli forces arrested five people, including four of his brothers, the correspondent added.