Three apparently stray mortar shells fired in the Syrian conflict struck the Israeli-occupied Golan Heights on Thursday, Israel's military said.

"They were apparently fired in error," an army spokesman told Agence France Presse, adding that they hit open ground and caused no injuries.

As Washington and Moscow discuss a Russian plan to rid Syria of chemical weapons, an Israeli official said Thursday that the existing Chemical Weapons Convention has not been a regional success.

The 20-year-old convention, which has been proposed as the tool for verifying Syrian compliance, has failed to attract the multilateral support that would allow it to work, Foreign Ministry spokesman Yigal Palmor said, adding that Israel signed in 1993 but has never ratified it.

Israeli troops escorting Jewish worshipers on a pre-dawn visit Thursday to a flashpoint shrine in the West Bank clashed with Palestinian protesters, wounding four, medics said.

The Palestinian medical officials said that one man wounded by live fire was taken to hospital in the city of Nablus and another was taken away by the Israelis.

The National Security Agency shares raw surveillance data with Israel without first removing information about U.S. citizens, according to a document leaked to the Guardian by former intelligence contractor Edward Snowden.

The arrangement is described in a memorandum between the two countries that allows the NSA to pass signals intelligence -- phone calls, faxes and other data scooped up in eavesdropping -- to Israeli intelligence services, reported the British daily, which posted the document online.

Israeli Prime Minister Benjamin Netanyahu said on Wednesday that the international community must ensure Syria is stripped of its chemical weapons as a lesson to its ally Iran.

Any impression of Syria getting away with its use of such arms would be taken as encouragement by Iran, which Israel and the West accuse of seeking to develop a nuclear arsenal, he said.

Israel's Supreme Court on Wednesday upheld a decision to bar entry to the Jewish state to a Polish humanitarian worker for having unspecified links to "terrorist elements".

Although Kamil Qandil had a valid visa when he landed at Ben Gurion airport near Tel Aviv on September 2, he was refused entry by immigration officials and held at the airport as he filed an appeal.

Israel's President Shimon Peres warned Wednesday that the United States would pursue military action against Syria should its regime fail to destroy its chemical weapons in line with a Russian proposal.

"If Syria is honest and will take real steps to remove and destroy the chemical weapons in its territory, the U.S. will not attack," Peres said in a statement.

Israel is to pay more than $1 million to the family of an alleged Mossad spy who hanged himself in prison in 2010, the justice ministry has said.

"After negotiations, the two parties (Israel and the family) have reached an agreement whereby the state will pay 4 million shekels ($1.1 million or 842,000 euros) to the family of the deceased," the ministry said in a statement late on Tuesday.

Israel's army has decided to close an investigation into the killing of a Palestinian activist during a West Bank demonstration in 2009, an Israeli rights group said Tuesday.

According to B'Tselem, the military's prosecutor general had decided to close the case for lack of evidence.

Senior Israeli politicians have voiced skepticism about Russia's proposal for Syria to surrender its chemical weapons to international control.

Avigdor Lieberman, who chairs the parliament's foreign affairs and defense committee, told Israel Radio on Tuesday that Syria could use the proposal to "buy time."