An IAEA report verifying that Iran has kept its promises under a nuclear deal it reached with world powers last year is likely to be issued on Saturday, paving the way for sanctions on Tehran to be lifted, a diplomatic source said on Friday.
Iranian and other officials had previously said they expected the report to come out on Friday.
"Almost all details are ironed out," said another diplomatic source, based in the Austrian capital.
Vienna is home to the International Atomic Energy Agency, the U.N. nuclear watchdog in charge of monitoring Iran's implementation of the measures required in the deal Iran reached with the United States, Russia, China, Britain, France and Germany last July.
The July deal calls on the agency to release its report once it has verified Iran has implemented all nuclear-related measures. The IAEA had no comment on Friday on the timing of the report.
Iranian officials have said Iran's Foreign Minister Mohammad Javad Zarif and the European Union's Federica Mogherini would issue a statement on Saturday or Sunday on the "Implementation Day" of the nuclear deal and the lifting of sanctions.