ABC:

Nikki Haley, the United States ambassador to the United Nations, is set to lay out Thursday what the Trump administration claims is "irrefutable evidence that Iran has deliberately violated its international obligations and has tried and failed to cover up these violations," her office said in a statement Wednesday.

The announcement will come as the U.N. presents a report today on the implementation of U.N. Security Council Resolution 2231. That's the resolution that endorsed the Iran nuclear agreement, known formally as the Joint Comprehensive Plan of Action, and calls on Iran not to undertake any activity related to ballistic missiles for eight years as well.

Among the incidents detailed in the report are several missiles fired by Houthi fighters in Yemen -- including one that landed close to Riyadh's international airport on Nov. 4 -- that the U.S. and others allege contain markings that show it came from Iran.

The report also mentions unmanned vehicles, drones and arms allegedly supplied by Iran to the Houthis.

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