TEHRAN: Big European banks remain reluctant to work in Iran four months after the lifting of international sanctions under a landmark nuclear deal with world powers, an Iranian official said on Sunday. “Major European banks have not yet started their interactions with Iranian banks, but some medium- and small-sized financial institutions have established relations, including opening letters of credit,” Deputy Foreign Minister Abbas Araghchi said. He accused ‘extremist lobbies’ in the US, Israel and Saudi Arabia of stirring up animosity towards Iran to prevent it from reaping benefits of landmark nuclear deal signed last July.