Rebels in Aleppo launch an assault on government-controlled areas in the city. This comes after the Syrian Army blocked off the only road leading into opposition-controlled areas. According to state media, at least eight people have been killed and dozens more are wounded.
Syrian government airstrikes in Damascus kill at least 30 people. According to the rebels, the airstrikes were revenge for the killing of a Syrian Air Force pilot by Al-Nusra Front yesterday. The airstrikes reportedly targeted a medical centre and a school.
At the International Institute for Strategic Studies Manama Dialogue security conference in Bahrain, Deputy Secretary of State Antony Blinken announces the United States will contribute $100 million (£64.7 million) in fresh aid to support the Syrian opposition.
Representatives from about 20 countries meet in Vienna, Austria, seeking a political solution to Syria's four-year civil war that has killed more than 250,000 people, including dozens more today. For the first time Iran is at the table, where diplomats seek peace through a ceasefire plan followed by a transitional government.
U.S. government officials say that they are willing to rewrite a proposed resolution to clarify that any operation would be limited in scope and duration and would not include the use of ground troops.
The summit is closed with accepting a 600-page final document that mainly focuses on the Palestinian issue as well as on Iran's nuclear energy program, but makes no mention of the Syrian civil war. A Chinese state commentary qualifies the summit as an "important" diplomatic "accomplishment from Iran", having hosted "leaders and delegates of over 100 countries".