Israel is "determined" to stop an activist flotilla that will try to reach the besieged Gaza Strip next week, the country's U.N. envoy said Thursday.

Setting off a new dispute with his Palestinian counterpart, ambassador Ron Prosor said: "Israel is determined to stop this flotilla. Israel has the right to self defense." He called the protest a "provocation."

Six migrants were killed in violence last month in a camp in Tunisia for some of the thousands of people who have fled the conflict in Libya, Human Rights Watch said Thursday.

It urged Tunisian authorities to do more to protect the more than 3,000 foreign nationals in the Choucha camp, saying people from sub-Sahara were the most vulnerable and citing claims that Tunisian forces were involved.

International Criminal Court judges will on Monday decide whether to issue an arrest warrant for Libyan leader Moammar Gadhafi for crimes against humanity, the court said on its website.

The ICC prosecution has requested three arrest warrants for Gadhafi, his son Seif al-Islam and the head of Libyan intelligence, Abdullah al-Senussi, the court said.

The European Union on Thursday announced fresh sanctions against President Bashar al-Assad's regime, adding 11 individuals and businesses to a list of Syrians already targeted.

"The Council today adopted a decision ... imposing restrictive measures on seven additional persons and introducing such measures against four entities associated with the Syrian regime, in view of the gravity of the situation," said a statement from the office of EU foreign policy chief Catherine Ashton.

The international Red Cross on Thursday demanded that Hamas show proof that Israeli soldier Gilad Shalit, captured five years ago, remains alive.

"Because there has been no sign of life from Mr. Shalit for almost two years, the ICRC is now demanding that Hamas prove that he is alive," said the International Committee of the Red Cross in a statement.

Activists called for a general strike across Syria on Thursday, which marks the 100th day since protests against the autocratic rule of President Bashar Assad first erupted.

The Facebook group Syrian Revolution 2011 posted the call to strike as a "sign of mourning" for those killed in a country-wide military crackdown on the opposition movement.

An Egyptian accused of spying for Israel was sentenced on Thursday to 25 years in jail by a special court.

Cairo's supreme state security court found Tarek Abdel Razek, who was arrested last year, and two Israeli officers guilty of "acts of espionage" on Israel's behalf.

Top U.S. official Jeffrey Feltman called Thursday for an "immediate" transfer of power in Yemen after he met the Arab nation's Vice President Abdrabuh Mansur Hadi, in comments to reporters in Sanaa.

"We continue to believe that an immediate, peaceful, and orderly transition is in the best interest of the Yemeni people," said Feltman, the U.S. Assistant Secretary of State for Near Eastern Affairs.

Kuwait's premier on Thursday comfortably survived a parliament vote called by the opposition in a bid to oust him over allegations he boosted ties with Iran rather than Gulf Arab states, the parliament speaker announced.

Only 18 MPs voted for the motion, seven votes short of the required number to unseat Prime Minister Sheikh Nasser Mohammad al-Ahmad al-Sabah, speaker Jassem al-Khorafi said after a secret session.

Hundreds of displaced Syrians poured into Turkey on Thursday after Syrian troops backed by tanks approached their makeshift camps along the border, an Agence France Presse journalist reported.

Several hundred people broke through the barbed wire marking the frontier between the two countries and were seen advancing into Turkish territory on a road used by Turkish border guards, a few kilometers from the Turkish village of Guvecci.