Member of the opposition accuses Iran of using talks to buy time . The sides could reach a deal in several months , says Iranian minister . Comment: P5+1 bloc , Rouhani 's visit culminated in a phone call with U.S. President Barack Obama and a meeting between U.S. Secretary of State John Kerry and Iran 's Zarif . Iran issue joint statement for first time , but it 's short on details .
Member of the opposition accuses Iran of using talks to buy time . The sides could reach a deal in several months , says Iranian minister . Comment: P5+1 bloc , Iran issue joint statement for first time , but it 's short on details .