Representatives from Syria's opposition National Coalition will meet the U.N.'s Syria envoy in Geneva next month as he seeks to revive peace talks, the group's president said Tuesday.

Coalition president Khaled Khoja said he had informed U.N. envoy Staffan de Mistura that a delegation from the exiled opposition body would attend bilateral talks in Geneva in May.

Syria's Defense Minister General Fahd al-Freij began a visit Tuesday to key ally Iran to discuss cooperation between the two countries' armies, Syria's official news agency SANA said.

The trip to Tehran comes after a series of recent military losses for President Bashar Assad's regime, which is battling an uprising that began more than four years ago.

Two mortar rounds fired from Syria struck open areas of the Israeli-occupied sector of the Golan Heights on Tuesday, an Israeli security source said.

"Two mortar shells fell in the northern sector of the Golan Heights," the source told AFP, saying it was a result of stray fire from fighting inside Syria and had caused no casualties or damage.

Saudi Arabian security forces on Tuesday arrested a second suspect in the fatal shooting of two policemen blamed on the Islamic State group, the interior ministry said.

Officers detained Nawaf bin Sharif Samir al-Anzi near the capital Riyadh after he opened fire on them, sparking an exchange of shots in which he was wounded, the ministry said in a statement carried by the official Saudi Press Agency.

Al-Mustaqbal Movement leader ex-PM Saad Hariri has blamed Hizbullah for the proliferation of terrorist groups in Lebanon and vowed to stop the eruption of a new civil war in the country.

“Hizbullah’s involvement in defense of the Assad dictatorship in Syria has imported terrorism to Lebanon,” Hariri said at the Wilson Center in Washington on Monday.

Some Damascus residents now fear the worst after Islamist coalition gains against the military in northern Syria. Despite regime reassurances, could jihadists infiltrate the capital?

"We are trembling with fear. If the extremists get in there'll be fighting in the streets. Everything will be destroyed," said marble merchant Mohammed Ayman in the Damascus city center.

Progressive Socialist Party leader MP Walid Jumblat hoped on the tenth anniversary of the withdrawal of Syrian troops from Lebanon for the implementation of the Baabda Declaration that would grant the army complete power over decisions of war and peace.

He said in his weekly editorial in the PSP-affiliated al-Anbaa website: “We look forward to the day when we celebrate the existence of a single central authority that oversees all others.”

A week of heavy fighting between security forces and the Islamic State jihadist group in the Ramadi area of Anbar province killed 30 police, a top officer said on Monday.

"The city of Ramadi witnessed heavy confrontations and fighting last week between security forces" and IS, Anbar police chief Staff Major General Kadhim al-Fahdawi said, putting the toll at 30 police killed and 100 wounded.

North Korea has increased its "material support" for terrorist organizations and should be placed back on America's list of nations that are state sponsors of terrorism, a report released Monday said.

The Pyongyang regime, at the time under the command of Kim Jong-il, was taken off the list in 2008 under the presidency of George W. Bush, who hoped to engage the reclusive nation in dialogue. 

Australia Monday said it was deeply concerned about an Australian-trained doctor who appears in an Islamic State propaganda video which urges other medical professionals to join the jihadists.

The slick video, uploaded to YouTube, shows a man who identifies himself as Abu Yusuf explaining that he traveled to the city of Raqa in Syria to use his medical skills to help the IS cause.