Secretary of State John Kerry says "progress" has been made with the Iranians. And some things have been "resolved."

"We’ve had meetings since early this morning. We have a couple of different lines of discussion that are going on right now, but I think it’s safe to say that we have made progress today. The atmosphere is very constructive," Kerry told the press today in Vienna.

"We still have a couple of very difficult issues, and we’ll be sitting down to discuss those in the very near term – this evening and into tomorrow. But I think we have resolved some of the things that were outstanding and we’ve made some progress."

Kerry is scheduled to leave Iran nuclear talks on Monday.