Some progress in Iran nuclear talks but long way to go - U.S. official

Political directors from Iran and the six major powers have agreed to resume talks next week at a venue to be decided, the official said, speaking after U.S. Secretary of State John Kerry and Foreign Minister Mohammad Javad Zarif held two-day talks in Geneva.

"These were very serious, useful and constructive discussions. We have made some progress but we still have a long way to go. We did very much sharpen up some of the tough issues so we can work to resolution," a senior U.S. administration official told reporters following intense talks.

(Reporting by Lesley Wroughton; editing by Stephanie Nebehay)