Negotiators at the Iran nuclear talks are expected to reach a provisional agreement Sunday. Photo: U.S. Department of State.

Negotiators at the Iran nuclear talks are expected to reach a provisional agreement Sunday on a historic deal that would curb the country’s atomic program in return for sanctions relief, diplomats told The Associated Press.

The two diplomats cautioned that final details of the pact were still being worked out Sunday afternoon and a formal agreement still awaits a review from the capitals of the seven nations at the talks. They said plans now are for the deal to be announced on Monday.

Read full story at the Associated Press.