There is no extra detail on this:

  • Iran's top security official says negotiators have evaluation of new components affecting Vienna talks on their agenda.
  • Also have the adoption of negotiation initiatives to accelerate achieving of a nuclear deal on the agenda

I think it may refer to earlier news that:

  • The latest on the talks coming over financial news are that Russia's Foreign Minister Sergei Lavrov has said the Western sanctions over Ukraine had become a stumbling block for the nuclear deal.
  • link here