An appeals court in Iran upholds a five year jail sentence against the owner of Mehdi Karroubi's opposition website.
At least 13 Iranian soldiers are killed in a battle with Islamist militants in a village near Aleppo, Syria. This is the largest single day loss for the Iranians since the start of the conflict. [http:--in.reuters.com-article-us-mideast-crisis-syria-idINKCN0XY0JV (Retuers)] [http:--www.businessinsider.com-r-iran-says-several-of-its-soldiers-killed-near-aleppo-2016-5 (Business Insider)] [http:--www.ndtv.com-world-news-13-iranian-revolutionary-guards-killed-in-syria-report-1403967 (NDTV)] Aleppo offensive (May 2016)
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.
President of Venezuela Hugo Chávez finishes a two-day visit to Iran, signing agreements on oil, energy and commerce. [http:--edition.cnn.com-2010-WORLD-meast-10-21-iran.chavez.visit-index.html?eref=edition (CNN) ]