EU's top diplomat Federica Mogherini will join ministerial negotiations on Iran's nuclear program in Vienna on June 28.
"The High Representative, the Vice-President Federica Mogherini will travel to Vienna on June 28 2015 to meet with the Foreign Ministers and Vice-Ministers and Iranian Foreign Minister Javad Zarif in the context of the ongoing nuclear talks," RIA Novosti cited the message of the European External Action Service as saying.