MNA � Iranian President's Chief of Staff Mahmoud Vaezi said that the members of UN Security Council are facing a major test to show their independence and react negatively to US pressure on Iran.

In a Monday tweet, Vaezi wrote, "Members of the UN Security Council are facing a major test to show the independence of their vote and to react negatively to US pressure on Iran, violation of UN Security Council resolution, and collapse of JCPOA."

His tweet came as US Secretary of State Mike Pompeo in his Twitter account praised the Secretary-General of the Persian Gulf Cooperation Council for his anti-Iranian letter to the UN Security Council.

"The [P]GCC�s letter calling on the @UN Security Council to extend the arms embargo on Iran is a bold statement. The US will introduce a resolution this week to extend the embargo after years of diplomacy. The Council must choose between arming terrorists or standing by the Gulf," Pompeo wrote on early Monday.

In a letter to the UN Security Council, Nayef Falah Mubarak Al-Hajraf, Secretary-General of the Persian Gulf Cooperation Council, has accused the Islamic Republic of supporting terrorism and sectarian organizations.

According to Resolution 2231, the UN arms embargo on Iran will end on October 18. According to reports, the US will offer the draft resolution of extending arms embargo in a UNSC session on Tuesday.

China and Russia have clearly announced that they will veto such a resolution, however, Foreign Policy has reported that Washington may even fail to attract the required 9 votes to pass the resolution in the first place.

The United States has started efforts to extend the embargo as a continuation of its anti-Iranian measures. Washington has also threatened that it might use the �snapback� mechanism of the JCPOA if the UNSC rejects the resolution. This is while Washington has �ceased participation� in the deal and, legally speaking, it is not able to trigger the mechanism.