Israel's deputy military chief has warned that Syria has the biggest chemical weapons stocks in the world and missiles and rockets that can reach any point in Israel.

Maj. Gen. Yair Naveh also said if Syria had the chance, it would "treat us the same way it treats its own people."

Al-Qaida's chief has urged Tunisians to rise up to demand the rule of Islamic law, slamming the ruling Ennahda Islamist party for "violating" sharia law, in a message posted online on Sunday.

"O, honest and free Tunisians. The masks have dropped. Rise up to support your sharia," said Ayman al-Zawahiri in an audio message entitled "People of Tunisia, support your sharia," posted on Islamist websites.

Libya on Sunday announced that elections for the country's constituent assembly, initially slated to be held by June 19, had been postponed to July 7.

"The date for the elections will be July 7," the president of the electoral commission, Nuri al-Abbar, told a news conference in Tripoli, citing "logistical and technical" reasons for the delay.

Al-Qaida's front group in Iraq on Sunday claimed a suicide car bombing against the Baghdad headquarters of an Iraqi Shiite foundation that killed 25 people, in a statement posted on jihadist forums.

"One of the passionate sons of the Sunnis came out in a quick attack against this evil lair that is called the Shiite endowment," the Islamic State of Iraq said, according to a translation of the message by the U.S.-based SITE Intelligence Group.

A gunfight during the night between two feuding tribes in Egypt's south has killed 12 people, a police official said on Sunday.

The official said the battle in the southern Aswan province, in which automatic weapons were used, left three wounded. The gunfight erupted as a dispute over land, he said.

Members of Libya's Toubou minority and government forces fought for a second consecutive day on Sunday, with the death toll rising to 23, tribal sources and a local military commander said.

Doctor Taher Wehli said 20 members of his Toubou community, including women and children, were killed since fighting erupted in Kufra on Saturday, with more than 50 other people wounded.

Iran's cyber police force is poised to launch a new crackdown on software that lets many Iranians circumvent the regime's Internet censorship, media reported on Sunday.

The operation will target VPNs, or Virtual Private Networks, which use a secure protocol to encrypt users' data, foiling online blocks put in place by Iran's authorities, according to the head of the specialized police unit, Kamal Hadianfar.

The situation in Syria resembles that of Bosnia in the 1990s, British Foreign Secretary William Hague said Sunday.

He said Syria seemed on the edge of collapse into sectarian civil war, as he refused to rule out the option of military intervention.

Violence in Syria killed at least 12 people on Sunday bringing the death toll since the start of the uprising against President Bashar Assad's regime to more than 14,100, a monitoring group said.

Those killed since March last year comprised 9,862 civilians, 3,470 soldiers and 783 army deserters, the Syrian Observatory for Human Rights said.

The Free Syrian Army on Sunday called on Syrians to begin a campaign of mass "civil disobedience" and also urged the strife-torn regime's military officers and troops to jump ship and join the rebel ranks.

"We call on Syrians to launch a general strike leading to mass civil disobedience," FSA spokesman in Syria Colonel Kassem Saadeddine said in a statement.