LAUSANNE /Switzerland/, March 20. /TASS/. The participants of talks on Iran’s nuclear file will keep seeking a mutually acceptable solution in Lausanne on Friday.

US Secretary of State John Kerry and Iranian Foreign Minister Mohammad Javad Zarif are to meet again Friday. They have been holding talks for a fifth day in a row.

Meetings involving political directors of the six international negotiators on Iran’s nuclear program are expected to be held today as well.

At a meeting in Vienna in November 2014, the P5+1 (the five permanent members of the UN Security Council - the United States, Russia, China, the United Kingdom, and France plus Germany) and Tehran agreed to extend the deadline for an agreement in the talks on Iran’s nuclear program to June 30, 2015.

The agreement stipulated that by the end of March 2015, the sides planned to achieve a principled political decision regarding disputed issues.

Iran says it needs nuclear power to generate electricity, but Western powers led by the United States claim Tehran's eventual aim is to create nuclear weapons.