Tehran, April 20, IRNA -- Deputy Foreign Minister for European and American affairs Majid Takht-e Ravanchi said on Monday that clinching a deal on nuclear dispute is not easy but Iran does its best to reach settlement.

Continued talks on remaining issues will be very complicated, he said.

Takht-e Ravanchi made the remarks in a conference on 'Views of pros and cons of nuclear negotiations in Lausanne'.

Iranian negotiating team will leave Tehran for Vienna on Wednesday to attend next round of nuclear talks with G5+1, he said.

'Presently, we are at writing stage of the comprehensive deal which is very tough but we will seriously continue with,' he underline

'We attend talks with open eyes and precisely, he said adding that these talks will be complicated but we will do our best to clinch a good deal.'

'We are involved in nuclear talks with US Administration and we have nothing to do with how the US government will deal with the Congress, the academics and the other bodies in the United States,' he said.

By IRNA