The United States has sent a letter to the International Atomic Energy Agency (IAEA) on Iran's nuclear program and its undeclared activities, demanding the importance of forcing Tehran to cooperate fully with the United Nations on its nuclear activities, while US Secretary of State Mike Pompeo accused Iran of secret nuclear activities.

In detail, Washington said in its letter: "We must ask ourselves what the Iranian regime is also hiding?" And denounced Iran's failure to respond to IAEA questions, which Washington considered unacceptable, unacceptable and disturbing.

In its letter, the United States said it was fully prepared to negotiate with Iran without preconditions in time. Washington's letter came a day after the IAEA's acting director-general, Cornell Verota, called on Iran to respond quickly to his organization's questions about its nuclear program, as Tehran takes steps to reduce its commitment to the terms of the nuclear deal.

Tehran is installing sophisticated centrifuges that would increase its stockpile of enriched uranium, the IAEA said, in a further step towards reducing Iran's obligations under a 2015 deal with major powers.

The agency said all centrifuges "were prepared for testing uranium hexafluoride, although none were tested on September 7 and 8, 2019."

Earlier in the day, Pompeo said his country was determined to impose measures that would prevent the Iranian regime from reaching a nuclear weapon.

"Iran's limited cooperation with the IAEA raises questions about the possibility of undeclared nuclear material or activities," Pompeo said.

"The world will not fool them, we will not allow the Iranian regime to have a nuclear weapon, and we will cut off all the roads leading to it," he said.

US special envoy to Iran, Brian Hawk, warned of the dangers of Iranian expansion in the region, noting that Iran is seeking to replicate the Lebanese experience in Yemen.

Hawk stressed that Iran should be prevented from consolidating its influence in Yemen, in parallel with restricting Iranian expansion in Lebanon, Syria and Iraq.

"The world must face Iran's ambitions, otherwise the Iranian crescent will become a full moon," Hawk said in an article in The Wall Street Journal. The American warning comes to warn of the dangers of the spread of Iranian influence across the border from Lebanon, Syria and Iraq to Yemen.

Hawk talked about a major game played by Tehran in Yemen, which will lead in the event of international failure to address them to great risks, headed by the "Lebanonization" of the country, ie, the reproduction of the Lebanese experience.

Hawk started from Iran's support for Hezbollah militias in Lebanon to explain his point of view. It began with the support of radical sectarian groups in the early 1980s, bringing together the most violent of them in a single organization called Hezbollah.

The same game is played by Tehran today in Yemen, according to the US official: «Here, the Iranians had the upper hand in the outbreak of war, by inciting them to overthrow the militias Houthi. However, they are not embarrassed to seek a seat at the negotiating table. ”

According to Hawk, Iran is using Yemen today to strengthen its regional standing.

Hawk, who criticized his country's poor media coverage of Iran's role in prolonging the tragic conflict in Yemen, came to the obvious conclusion: "Preventing Iran from establishing itself in Yemen is a necessity, not a choice."

In London, Britain summoned the Iranian ambassador yesterday to denounce what it said was a clear violation of its assertions about the oil shipment carried by the tanker Adrian Daria I, which had previously been detained for violating EU sanctions.

"Iran has shown total disregard for its assertions about Adrian Daria I," Foreign Minister Dominique Rapp said in a statement, accusing Iran of failing to honor its pledge not to transport oil from the tanker to Syria.

He added that this sale of oil to the Syrian government is part of the behavioral pattern of the Government of Iran, which is aimed at destabilizing regional security. Britain said it would raise the issue at the United Nations this month.

Britain summons the Iranian ambassador, and considers the sale of oil to the Syrian government part of the behavioral pattern of the Iranian government, which aims to destabilize regional security.