Russia and the United States have made progress on reaching a new deal to cut nuclear weapons, Russian Foreign Minister Sergei Lavrov was quoted as saying by local news agencies.

Lavrov said negotiators would report progress on finding a replacement to the START-1 nuclear weapons treaty to the presidents of both countries when they meet on the sidelines of the G-20 summit in Pittsburgh later this month.

"We will have something to report by Pittsburgh," Lavrov was quoted as saying. Lavrov said he was confident that a replacement to the START treaty would be found before it expires in December.

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