Supporters of Muslim Brotherhood's candidate Mohamed Morsi celebrate at Tahrir Square in Cairo, Egypt,on June 18, 2012. (Xinhua File photo)

DOHA, May 1 (Xinhua) -- Iranian Foreign Minister Mohammad Javad Zarif on Wednesday voiced his country's rejection to a U.S. plan to designate the Muslim Brotherhood as a terrorist organization.

"The U.S. is in no position to ... start naming others as terror organizations and we reject by any attempt by the U.S. in this regard," Zarif told reporters on the sidelines of the Asia Cooperation Dialogue, inaugurated earlier in the day in the Qatari capital Doha.

"The U.S. is supporting the biggest terrorist in the region, that is Israel," he said.

The White House said on Tuesday that U.S. President Donald Trump is working to designate the Muslim Brotherhood as a terrorist organization, which would lead to sanctions against the oldest Islamist movement of Egypt.

The Muslim Brotherhood is a transnational Islamist organization founded in Egypt by Islamic scholar and schoolteacher Hassan al-Banna in 1928.