Analysis of information sources in references of the Wikipedia article "Conflito israelo-palestino" in Portuguese language version.
A Hamas spokesperson earlier told the BBC that the militant group had backing from its ally, Iran, for its surprise attacks on Israel
Some observers have referred to the latest escalation as the beginning of the "Third Intifada".
Israeli tanks massed at the Gaza border as warplanes again pounded Hamas targets in the densely populated enclave where raids have killed nearly 300 people in less than two days.
Late on Saturday thousands of Israeli troops and tanks invaded the Hamas-ruled Gaza Strip after eight days of punishing air strikes failed to halt the group's rocket fire into Israel.
Some observers have referred to the latest escalation as the beginning of the "Third Intifada".
