US Secretary of State Mike Pompeo. (Photo: AFP/VNA)

He said every nation that seeks peace and stability in the Middle East and supports the fight against terrorism should refrain from any arms transactions with Iran.

The warning was made as the embargo on the sale of conventional arms to Iran, which was part of the nuclear deal agreed with world powers in 2015, officially expired on Sunday.

Earlier, the US had urged the UN Security Council to extend the embargo, but the request was rejected, so the US announced it was unilaterally re-imposing UN sanctions on Iran last month.