Iran's Foreign Minister, Mohammed Jawad Zarif, said on Thursday that US has violated even the treaties signed, and therefore face two files in the International Tribunal.

Zarif said in a tweet : US has violated these treaties previously, so it faces two files in the International Tribunal, in response to a statement by a senior US official on the nuclear agreement.

He said that the United States described the nuclear agreement as an individual agreement between two governments, and claimed that it is in the process of a new treaty, this is not true. The reality is that this agreement is an international agreement supported by a resolution of the UN Security Council. Moreover, the United States had violated the treaties it had concluded, and therefore faced two cases in the International Tribunal.

In a speech at the conservative Hudson Foundation, Brian Hawk, the head of Iran's Task Force on Iran, said the nuclear deal was an individual agreement between the Iranian government and Barack Obama.

He said that Washington is now in the process of a treaty with Iran to restrict the Iranian nuclear and missile program simultaneously, and is approved in the Senate.

U.S. President Donald Trump pulled out of that nuclear accord - which curbed Iran’s atomic activities in return for sanctions relief - in May, saying it did not go far enough.

The U.S. special envoy for Iran, Brian Hook, said on Wednesday that Washington now wanted to negotiate a treaty that included Tehran’s ballistic missile program and its regional behavior.

Hook said the new deal that Washington hoped to sign with Iran, would not be a “personal agreement between two governments like the last one, we seek a treaty.”

Iranian Foreign Minister Mohammad Javad Zarif took to Twitter to dismiss the characterization of last deal as a “personal agreement”, saying it was “an int’l accord enshrined in a UN (Security Council resolution)”.

“U.S. has violated its treaty obligations too... Apparently, U.S. only mocks calls for peace,” he added in the message that was attached to a video of a protester who took to the stage after Hook’s speech, shouting that sanctions were hurting Iranian people.

The five other world powers that signed the 2015 accord with Iran - France, Germany, Britain, China and Russia - have been trying to salvage it, saying it offers the best chance . Tehran says its nuclear work is for electricity generation and other peaceful purposes.