The second day of talks between the six world powers and Iran began with a one-on-one session between EU foreign policy chief Catherine Ashton -- representing the world powers -- and chief Iranian negotiator Saeed Jalili.
All the nations involved then opened a full plenary session behind closed doors. The first day's session lasted three hours but on the second day it wrapped up in just one hour.
The powers made an offer to ease some sanctions on Iran in exchange for concessions on its disputed nuclear programme -- a proposal that had been discussed in various forms at three previous meetings in the past year.
Ashton's spokesman had made clear late Tuesday that it was very much up to Iran to respond to the offer, although Tehran had also said it was coming up with counter offers of its own.