By Matthew Lee
The diplomats hope to narrow gaps in search of a deal that would offer Iran sanctions relief in exchange for proving its atomic ambitions are peaceful.
A senior U.S. official says Kerry and Ashton are meeting separately at the luxury Geneva hotel where they are both staying. Later Saturday, Iranian Foreign Minister Javad Zarif is expected to join them. There was no immediate indication of how long the three-way meeting would last.
On Friday, the trio met for five hours.
The negotiations appear to have made some progress in a major diplomatic push despite fierce opposition from Israel and uncertainty in Congress.
