Iran's Foreign Minister Mohammad Javad Zarif (C) exits after attending a meeting of the parties to the Iran nuclear deal during the 72nd United Nations General Assembly at U.N. headquarters in New York, U.S., September 20, 2017. (Reuters Photo)

TEHRAN, Oct. 8 (Xinhua) -- A dual-national member of Iran's nuclear negotiating team has been jailed for five years for spying, news agency Tasnim said on Sunday.

Spokesman for the judiciary Gholamhossein Mohseni Ejei named the convicted man as Abdolrasul Dori Esfahani.

Tasnim reported that he was in charge of banking affairs during the talks. According to Iranian media, he has Iranian and Canadian citizenship.

"He was one of the people accused of spying and passing intelligence to strangers and he was linked to two intelligence agencies," Mohseni Ejei said.

He said Dori Esfahani's five-year sentence was upheld after a failed appeal, Tasnim reported. Dori Esfahani also faces charges of financial corruption, Mohseni Ejei said.

Iran reached a nuclear deal with the United States and five other major powers in 2015 that led to the lifting of most international sanctions against it in return for curbs on its nuclear program.

Security officials have arrested several businessmen, including Iranians holding joint U.S., European or Canadian citizenship, as part of a crackdown on "Western infiltration."