VIENNA (AP) — Facing stubborn disputes on the terms of a deal, Iran and six world powers have tentatively decided to adjourn their nuclear talks two days early but plan to extend them past their planned July 20 end date, diplomats said Wednesday.

Both sides had been prepared to talk until Sunday, the informal deadline for the negotiations. But two diplomats have told The Associated Press the talks will probably wind down Friday, because the differences won’t be bridged by Sunday.