Gaza, April 28 -- At least 22 Palestinians were killed and several others injured on Saturday due to Israeli airstrikes on central and southern Gaza, according to Palestinian sources.

Palestinian security sources told Xinhua that Israeli warplanes targeted a populated house in the Nuseirat refugee camp in central Gaza with a number of missiles, killing nine Palestinians, including four children, and injuring 30 others.

In another Israeli airstrike targeting a house in the far south of the Gaza Strip, six Palestinians, including four children, were killed, and eight others were injured, according to medical sources.

Later, warplanes targeted a house in the "Nasir" neighborhood north of Rafah, where seven Palestinians were killed and seve...