Palestinian medical sources said that seven more Palestinians, including three children, were killed on Friday in Israeli airstrikes.
The three Palestinian children from one family were killed when Israeli artillery fire hit their home in Gaza City, with 15 others injured, medics told Xinhua.
Earlier in the day, a Palestinian young man was killed in Israeli air raid in the southern Gaza Strip city of Rafah.
In Biet Lahiya town, north of Gaza, a mentally disabled young man was killed when Israeli warfighters raided the town.
Another man was killed in an Israeli airstrike in the southern Gaza Strip city of Khan Youis, medical sources said.
The sources added that a man died of wounds he sustained earlier on Friday in Rafah City, south of Gaza.
So far, 278 Palestinians were killed and more than 2,000 were injured since Israel started Operation Protective Edge on July 8, to end Gaza rockets into Israel.
Death toll mounted to 40 since late Thursday night Israeli stepped a limited ground operation in Gaza which aims at destroying tunnels used by militants to carry our military operations inside Israel.