Hundreds of Iranian troops have arrived in Syria in the last 10 days and will soon join government forces and their Lebanese Hezbollah allies in a major ground offensive backed by Russian air strikes, two Lebanese sources told Reuters.

• October 1, 2015

Russia launched air strikes in Syria on Wednesday in the Kremlin's biggest Middle East intervention in decades, but Moscow's assertion that it had hit Islamic State was immediately disputed by the United States and rebels on the ground.

• September 30, 2015

France challenged Russia to back its words with deeds over fighting Islamic State militants in Syria as major powers on Tuesday struggled to resolve differences between Moscow and the West over ending the civil war in the Middle Eastern country.

• September 30, 2015

The United States and Russia agree on "some fundamental principles" for Syria, the U.S. Secretary of State John Kerry said on Tuesday, adding that he plans to meet again with Russian Foreign Minister Sergei Lavrov on Wednesday.

• September 29, 2015

Russian President Vladimir Putin is preparing for unilateral air strikes against Islamic State in Syria if the United States rejects his proposal to join forces, Bloomberg reported on Wednesday, citing two people familiar with the matter.

• September 24, 2015

An Israeli-Russian coordination team set up to prevent the countries accidentally trading fire in Syria will be headed by their deputy armed forces chiefs and will hold its first meeting by Oct. 5, an Israeli military officer said on Thursday.

• September 24, 2015

Syrian government forces used newly arrived Russian warplanes to bombard Islamic State insurgents in Aleppo province in northern Syria, a group monitoring the civil war said on Thursday, in an attempt to break a siege on a nearby air base.

• September 24, 2015

Croatia has lifted a blockade on its border with Serbia on September 25, ending a week of border disputes between the two countries over the flow of migrants.

• September 24, 2015