Hamas on Saturday warned Israel of "consequences" after its latest air strike on Gaza killed three members of the radical Islamist group's armed wing.

Medical staff and witnesses said earlier one Palestinian was also wounded in the air strike in the southern Gaza Strip.

Facebook and co-founder Mark Zuckerberg have been hit with a lawsuit seeking more than $1 billion in damages over a page on the social network which called for a "Third Intifada" against Israel.

Facebook this week shut down the "Third Intifada" page, which had almost 500,000 fans, but the lawsuit filed in a court here claims that the social network showed "negligence" by not quickly responding to appeals to remove the page.

Loyalty to the Resistance bloc MP Nawwaf Moussawi stressed on Friday the need for Lebanon to take an official stance and respond to Israeli leaks of military and security plans to attack Lebanon.

It should retaliate through a media, political, and diplomatic campaign that would prevent the Jewish state from “fabricating facts before the international public opinion.”

The Israeli military held a set of war games this week aimed at preparing the army for all-out war with Hizbullah, Syria and Hamas, the Jerusalem Post reported.

The drill did not include soldiers or live-fire exercises, but was held to drill commanders and their decisions in the event of a large-scale war on multiple fronts, it said.

A map of alleged Hizbullah installations provided to The Washington Post this week by Israeli military officials identifies more than 550 underground bunkers, 300 surveillance sites and 100 other facilities in southern Lebanon, the newspaper said.

“In releasing the map, the Israeli military appeared to be trying to preempt international criticism of any future offensive against the alleged sites, many of which are located in residential villages alongside hospitals, schools and even civilian homes,” the Post said.

Facebook on Tuesday removed a page calling on Palestinians to take up arms against Israel, following a high-profile Israeli appeal to the popular social-networking site.

The affair highlighted how Facebook is increasingly involved in charged political conflicts, balancing between protecting freedom of expression and defending against hate speech.

Israel's Knesset, or parliament, has passed a law which would enable the court system to revoke the citizenship of anyone convicted of spying, treason or helping the enemy during times of war.

The bill, which was passed by 37 to 11 at a late-night session on Monday, was initiated by two Knesset members (MKs) from the ultra-nationalist Yisrael Beitenu party of Israeli Foreign Minister Avigdor Lieberman.

Security forces arrested on March 21 an individual suspected of collaborating with Israel, announced the ISF in a statement on Monday.

It revealed that the citizen had been collaborating with Israeli intelligence from 2006 until early 2011.

Israel on Sunday stationed the first batteries of its "Iron Dome" short-range missile defense system in the south of the country, but stressed the initial deployment was experimental.

The unique multi-million dollar system was stationed outside the southern city of Beersheva, days after it was hit by several rockets fired from the Gaza Strip amid a rise in tensions and tit-for-tat violence.

An Israeli air strike killed two people in the Gaza Strip on Sunday, medics said, a day after Palestinian militants said they were committed to calming tensions if Israel reciprocated.

"Two Palestinians were killed and another wounded Sunday morning in an Israeli air raid on targets east of Jabaliya," said Adham Abu Senmya, spokesman for the Gaza emergency services.