Iran, U.S. have started negotiations in Oman over Tehran's rapidly advancing nuclear program

Envoys from Iran and the United States began negotiations Saturday in Oman over Tehran's rapidly advancing nuclear program.

No overall agreement is immediately likely, but the stakes of the negotiations couldn't be higher for these two nations closing in on half a century of enmity. President Trump repeatedly has threatened to unleash airstrikes targeting Iran's nuclear program if a deal isn't reached. Iranian officials increasingly warn that they could pursue a nuclear weapon with their stockpile of uranium enriched to near weapons-grade levels.

Flight-tracking data analyzed by The Associated Press showed a private jet from Pulkovo Airport in St. Petersburg, Russia, arrived in Oman on Saturday morning. U.S. Mideast envoy Steve Witkoff had just met Russian President Vladimir Putin on Friday there.