Officials from Iran and the United States have begun the second day of their latest round of talks over Tehran’s nuclear energy program in the Swiss city of Montreux.Iranian Foreign Minister Mohammad Javad Zarif and US Secretary of State John Kerry are heading the talks on Tuesday. The meeting is also attended by head of the Atomic Energy Organization of Iran(AEOI), Ali Akbar Salehi, deputy foreign ministers Abbas Araqchi and Majid Takht - e Ravanchi, Iranian president ' s special assistant, Hossein Fereidoun, US Energy Secretary Ernest Moniz, as well as US Under - Secretary of State for Political Affairs Wendy Sherman, and European Union ' s Deputy Foreign Policy Chief Helga Schmid.READ MORE:Netanyahu vows to stop Iran nuclear programThe Iranian and American negotiators met for 2.5 hours on Monday. The AEOI chief and US energy secretary also held a separate meeting for three hours on Monday and then joined other negotiators in the ministerial talks. The new round of talks in Montreux comes as representatives from Iran and the United States held three rounds of intense negotiations in the Swiss city of Geneva on February 22-23 to bridge their differences ahead of a key July 1 deadline for reaching a comprehensive deal.READ MORE:Iran to resume its entire nuclear activities if talks fail Iran and the P5+1 countries – Britain, France, China, Russia, and the United States plus Germany – are in talks to narrow their differences on outstanding issues related to Iran's nuclear energy program. The two sides have missed two deadlines since an interim deal was signed in November 2013. They have set July 1 as the next deadline for the talks. Source: PressTV