U.S. nuclear negotiators should stop focusing on Iran's number of centrifuges and should push for a deal, which could help build confidence between Iran and the coalition of countries fighting against Islamic State militants, a senior Iranian politician said on Wednesday, Reuters reported.

"This is something like a trivial matter and we should not bargain over trivial matters," Iran's Parliament Speaker Ali Larijani told a news conference in Geneva.

"This is not going to be useful, this is not going to solve any real problems."

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