Iran and the United States concluded a fifth round of high-stakes nuclear talks in Rome on Friday amid growing skepticism in Tehran about the chances of a deal as Washington hardens its position.

ROME (AP) — Iran and the United States prepared for a fifth round of negotiations over Tehran’s rapidly advancing nuclear program Friday in Rome, with enrichment emerging as the key issue.

Iran and the United States made "some but not conclusive progress" Friday in a fifth round of negotiations in Rome over Tehran's rapidly advancing nuclear program, the talks' Omani mediator said.