Nikki Haley
Nikki Haley Reuters

The U.S. Ambassador to the UN Nikki Haley will present "irrefutable evidence" that Iran has tried to cover up violations of international obligations, the U.S. mission said Wednesday, according to AFP.

Haley will hold a press conference in Washington on Thursday on Iran's "ongoing destabilizing activities in the Middle East and elsewhere in the world," said a statement from her office.

"Ambassador Haley will offer irrefutable evidence that Iran has deliberately violated its international obligations and has tried and failed to cover up these violations," added the statement.

No further details were provided, but AFP noted that the United States and Saudi Arabia have accused Iran of supplying weapons to Yemen's Houthi rebels, who fired a missile intercepted near Riyadh airport on November 4.

Haley has called on the UN Security Council to take a tougher stance toward Iran, accusing Tehran of making illegal arms deals in Yemen, Lebanon and Syria.

In October, she said that "the United States has embarked on a course that attempts to address all aspects of Iran's destructive conduct -- not just one aspect. It's critical that the international community do the same.”

Those remarks came after U.S. President Donald Trump announced he would not recertify the Iran nuclear deal.

Trump's decision has been sharply criticized by Washington's partners in the deal -- France, Britain, China, and Russia -- which sit on the Security Council as permanent members along with the United States. Germany is also a signatory to the agreement.

A confidential report to the Security Council says UN officials had examined debris from missiles fired at Saudi Arabia which pointed to a "common origin" but there was no firm conclusions as to whether they came from an Iranian supplier, noted AFP.

The report from UN Secretary-General Antonio Guterres, which was obtained by the news agency, said the officials were still analyzing the information.

A separate team of UN experts who inspected the missile fragments during a visit to Riyadh last month found a possible link to an Iranian manufacturer, the Shahid Bagheri Industrial Group, which is on the UN sanctions blacklist.