Disputes over attempts to probe Tehran’s alleged work on nuclear weapons are delaying an agreement. Photo: Wikimedia Commons.

Disputes over attempts to probe Tehran’s alleged work on nuclear weapons unexpectedly persisted at Iran nuclear talks on Monday, diplomats said, threatening plans to wrap up a deal by midnight — the latest in a series of deadlines for the negotiations.

The diplomats said at least two other issues still needed final agreement — Iran’s demand for a lifting of a U.N. arms embargo and its insistence that any U.N. Security Council resolution approving the nuclear deal be written in a way that stops describing Iran’s nuclear activities as illegal. They demanded anonymity because they are not authorized to discuss the negotiations.

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