The Iranian government has demanded that the United States apologize over false claims that they had planned a terrorist attack against a Saudi ambassador in Washington D.C.

The Swiss embassy in Tehran, which represents the United States in Iran, received an official letter from the Iranian government.  It summarizes Iran's complaint that the United States has supposedly made unproven allegations that the Majlis, the Iranian Parliament, was involved in the assassination plot that was uncovered earlier this month. 

In a recent letter to the U.S. government, Iran has insisted that American authorities must publicly apologise to the Iranian government and its citizens for the false accusations they publicised against Tehran in violation of international norms and regulations, said a reporter on Iran's state-run Press TV, according to The Guardian.

According to The Daily News, an anonymous diplomatic source said the letter emphasized Iran's stance that the United State's allegations was based solely on lies.  The letter also allegedly said that the United States violated international laws with its diplomatic tactics.

The letter emphasized that Iran demanded an apology for tarnishing its image on the world stage and undisclosed compensation.

The United States claimed that Adel al-Jubeir, a naturalized American citizen from Iran, attempted to hire the Mexican drug cartel in order to carry out the killing of the Saudi ambassador to the United States and the bombing of the Israeli embassy.

The United States has continually backed the investigations done by the federal agents who uncovered the plot and has called for tougher sanctions against Iran.

Iran, however, has tried to distance itself from the plot by blaming a rebellious faction called the People's Mujahideen of Iran and accusing the United States for its attempt to harm its repetuation.

Americans have not presented any compelling evidence whatsoever to Iran to prove the plot was hatched by the Islamic Republic. Neither have they provided consular access to Mr Arbabsiar, said the anonymous diplomat, according to The Daily News. This plot, which was discovered this time again by an 'undercover American agent,' is yet another [entrapment] scenario painted by the U.S. government to impede growing Iranian progress and make trouble for the country.