Diplomats negotiating in Vienna over reviving Iran’s 2015 nuclear agreement (JCPOA) will wrap up their first session of talks on Friday with a final meeting.

European and Iranian officials said they will hold a last formal session before adjourning. The United States is not a direct participant in the talks because it withdrew from the agreement in 2018 and imposed heavy sanctions.

The meeting of Iran, France, Germany, Britain, Russia and China is in a format known as the Joint Commission which has bookended previous rounds of talks. The Iranian official said the meeting would be held around noon (1100 GMT). The aim is to resume the talks next week, the European diplomat said.

On Thursday, Iran submitted two documents to the Commission members outlining its position on removing US sanctions and its own nuclear program. Diplomats said they will study Iran’s proposals.

Both Washington and Tehran sounded pessimistic on Thursday about the outcome of the talks, as each called on the other party to show goodwill.