By CNN's Jim Sciutto and Greg Botelho
Momentum appears to be building for a breakthrough deal on Iran's nuclear program, with top diplomats flocking to the site of ongoing talks and one Western official saying Friday a deal could be reached "as soon as tonight."
U.S. Secretary of State John Kerry and British Foreign Secretary William Hague will both be in Geneva on Saturday. French Foreign Minister Laurent Fabius headed to the Swiss city on Friday night, according to an European Union diplomatic source, and Chinese Foreign Minister Wang Yi has left Beijing for Geneva, according to his ministry's website.
FULL STORYBy CNN Chief National Security Correspondent Jim Sciutto
In a possible sign of a breakthrough, several top diplomats - including those from the United States, Russia, the European Union and Iran - met in or headed to Geneva on Friday for talks on Tehran's nuclear program.
U.S. State Department spokeswoman Jen Psaki said that Secretary of State John Kerry would depart for the Swiss city "later today with the goal of continuing to help narrow the differences and move closer to an agreement." The American diplomat is expected to land there around 7:45 a.m. Saturday (1:45 a.m. ET), according to a Western official.
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