"We are trying to be able to resolve all the issues within the next few days and then get down to writing the exact details," Mohammad Javad Zarif said.
Zarif noted that the nuclear talks have advanced in the "right direction," adding, however, that the sides still need to reach an agreement on all the aspects of the deal.
Iran and P5+1 countries, comprising Russia, China, the United States, the United Kingdom, France and Germany, have been trying to reach an agreement guaranteeing a peaceful nature of the Iranian nuclear program for more than a year.
The new round of talks on the Iranian nuclear program between Tehran and the P5+1 group started on Thursday in Lausanne, Switzerland. The talks are to last until March 29.
The final deal is expected to be reached by July 2015.
