Fighting raged in Syria's second city Aleppo on Monday amid a disputed claim that the army had managed to seize the strategic district of Midan from rebels, the Syrian Observatory for Human Rights said.

The army clashed with rebel fighters in several districts of the northern city, which has been the site of fierce fighting since July 20, the Observatory said.

The international peace envoy for Syria, Lakhdar Brahimi, was to hold talks in Cairo on Monday with Arab League chief Nabil al-Arabi following his trip to Damascus, the organisation said on Monday.

"Brahimi will brief Arabi on his visit to Syria and his meeting with Syrian President Bashar Assad and members of the opposition there," an Arab League official said.

The foreign ministers of Iran, Saudi Arabia, Egypt and Turkey are to hold their first high-level meeting on the Syria conflict on Monday in Cairo, Iran's official news agency IRNA reported.

Iranian Foreign Minister Ali Akbar Salehi was also to speak with Egypt's President Mohamed Morsi in a separate bilateral meeting during his visit to Cairo, it added.

A suicide bomber on Monday killed seven people and wounded an MP in an attack at an entrance to Baghdad's heavily secured Green Zone, where the Iraqi government and U.S. embassy are based, officials said.

The attacker drove up to the entrance situated at the July 14 bridge across the Tigris River from the Green Zone before detonating an explosives-rigged vehicle, an interior ministry official said.

The gap between Israel and the United States on Iran widened Sunday as Benjamin Netanyahu insisted on a "red line" from Washington, claiming Tehran is "90 percent" toward having a nuclear bomb.

The Israeli leader, speaking on two U.S. political television talk shows, pressed the need for a categorical bar on Iran, saying such a safeguard had averted nuclear calamity with Russia during the Cold War and could ensure peace again.

A major U.S.-led naval minesweeping exercise got underway in the Gulf Sunday as tension remain high over Iran and its controversial nuclear program.

The exercise kicked off on the same day the head of Iran's Revolutionary Guards warned of retaliation against the Strait of Hormuz, Israel and nearby U.S. bases if his country is attacked, and as Israeli Prime Minister Benjamin Netanyahu insisted on a "red line" from Washington, claiming Tehran is "90 percent" toward having a nuclear bomb.

Sudanese President Omar al-Bashir, who is wanted by the International Criminal Court, held talks with Egypt's Mohammed Morsi in Cairo on Sunday, officials said.

Bashir was met at Cairo's airport by Vice President Mahmud Mekki, and arrived with a large delegation of ministers.

The U.S. embassy in Yemen has suspended all consular services for two weeks, the mission said in a statement on its website, after four people were killed in violent anti-American protests in Sanaa.

The statement, published Saturday, said the embassy will be "closed for all consular services through September 29," warning citizens of the "potential" for protests near the mission.

International peace envoy to Syria Lakhdar Brahimi departed Damascus on Sunday after a four-day visit during which he met with President Bashar Assad, an AFP correspondent reported.

The veteran Algerian diplomat was seen leaving his hotel accompanied by Syria's deputy foreign minster Faisal Muqdad, and a U.N. official confirmed he was departing the country.

Libyan authorities have arrested at least 50 people in the wake of last week's killing of U.S. Ambassador Chris Stevens in a mob attack in the city of Benghazi, Libya's parliament chief said Sunday.

"The number reached about 50," Mohammed al-Megaryef, president of the Libyan National Congress, told CBS News in an interview.