While answering a question on U.S. President Donald Trump’s indecision to whether keep or tear up a historic nuclear deal that was signed between Iran and six world powers, Iranian Foreign Minister Mohammad Javad Zarif said, “Do not take what Mr. Trump says very seriously," Iran's ISNA news agency reported on Wednesday.

The White House has launched a comprehensive review of the nuclear deal with Tehran, after Trump said Iran has not been living up to “the spirit” of the nuclear deal.

It came after Secretary of State Rex Tillerson wrote a letter to Congress, confirming that Iran was compliant with its commitments under the deal. Tillerson also repeated the country’s anti-Iran rhetoric and called Iran “the world’s leading state sponsor of terrorism.”

Subsequently, Iranian Foreign Minister Mohammad Javad Zarif took to Twitter to respond to Tillerson’s accusations, stressing that instead of repeating accusations against Iran, the U.S. should fulfil its obligations under the 2015 nuclear deal. 

During his campaign trail, Trump promised to tear up the deal, but after entering the White House he changed his tone and said the United States will remain committed to the accord.

Earlier today, a U.S. administration official familiar with the matter said the Trump personally intervened to inject tougher language into a State Department letter to Congress last week that found Iran was in compliance with the deal limiting its nuclear program.

Those Tillerson comments also came at Trump’s request, the official said.

Responding to Washington's decision to review the nuclear agreement, Iranian Deputy Foreign Minister Abbas Araqchi said on Tuesday that the review of the international accord is creating an atmosphere of distrust and confusion among world countries, noting this is contrary to the text and spirit of the agreement.

Araqchi, who on the part of Iran is tasked to monitor the implementation of the 2015 nuclear agreement between Tehran and six world powers, pointed to the U.S. failure to fully commit to the July 2015 nuclear accord. 

According to Araqchi, all cases regarding the issue were to be raised during the seventh meeting of the Joint Commission of the Joint Comprehensive Plan of Action (JCPOA), which started in Vienna on Tuesday.