Political decisions need to be made to end the Vienna talks on reviving the 2015 Iran nuclear deal, said Enrique Mora, deputy secretary-general of the European External Action Service, on Monday.

"It is time, in the next few days, for political decisions to end the Vienna talks. The rest is noise," Mora said on Twitter.

Mora is acting as the European Union's coordinator in the negotiations in Vienna. His comments came as Iranian Foreign Ministry spokesman Saeed Khatibzadeh said in Tehran on Monday that few differences remain between Iran and the West.