U.S. Secretary of State John Kerry speaks after the Security Council voted on a resolution that will require Syria to give up its chemical weapons during a United Nations Security Council meeting on the situation in Syria, Friday, Sept. 27, 2013, at U.N. headquarters. / AP Photo/Mary Altaffer
Geneva, (CBS News)-- Iran and six world powers have reached an agreement on curbing Iran's nuclear program in exchange for limited sanctions relief, several delegations in the talks said early Sunday.
"We have reached an agreement," Iranian Foreign Minister Mohammad Javad Zarif announced on his Twitter feed.
French Foreign Minister Laurent Fabius also confirmed the deal.
No details of the agreement reached were immediately available.