More suspected Iranian-made weapons have been found in Yemen, the UN says in a report that will be discussed Wednesday by the Security Council.
The Gulf nations and the United States accuse Iran of supporting Houthi insurgents in Yemen.
Iran supports the rebels politically but denies supplying them with arms.
The report from UN Secretary-General Antonio Guterres' office says his staff examined two container launch units for anti-tank guided missiles recovered by the Saudi-led coalition in Yemen.
"The Secretariat found that they had characteristics of Iranian manufacture," the report said.
"The Secretariat also examined a partly disassembled surface-to-air missile seized by the Saudi-led coalition and observed that its features appeared to be consistent with those of an Iranian missile," it added.
A probe into the origin of the weapons continues, it said.
US Secretary of State Mike Pompeo was expected to attend Wednesday's meeting on Iran, scheduled to start at 1500 GMT.
Guterres' report mainly addresses Iran's obligations under the 2015 nuclear deal it struck with six major powers. The United States pulled out of the accord in May and has reimposed sanctions on Iran.
The report concludes that Iran continues to abide by the nuclear accord, under which it won sanctions relief in exchange for limiting its nuclear program.
