The United States president, Donald Trump has slapped down a bid by the European Union to shield European businesses from the impact of the new US sanctions against Iran.

On Tuesday, Trump tweeted that the new measures taken against Iran have officially been cast, warning that any country transacting business with the Middle Eastern country would be sidelined by the US.

“The Iran sanctions have officially been cast. These are the most biting sanctions ever imposed, and in November they ratchet up to yet another level.

“Anyone doing business with Iran will NOT be doing business with the United States. I am asking for WORLD PEACE, nothing less!,” Trump tweeted.

American sanctions on Iran had been eased for several years under the terms of a 2015 nuclear deal which Trump announced he would pull out of in May 2018, even as he maintained that more measures targeting Iran’s oil sector and central bank would be re-imposed in November.

Reacting to the recent US sanctions which have already dealt significant blows to the country, Iranian president, Hassan Rouhani described them as a psychological warfare that should not be condoned by the international community.