Iranian President Hassan Rouhani said that, despite the achievement of a number of agreements on Iran's nuclear program in Lausanne in April, the upcoming negotiations of the P5+1 group plus Iran to reach a comprehensive agreement will be very difficult.
"In these negotiations, we agreed on solutions and we have a very tough road ahead before reaching the final outcome," RIA Novosti cited him as saying.
Rouhani described reached agreement as a "big step". However, in his opinion, all the sides must stick to their commitments for a permanent agreement to be achieved.
