Foreign ministers and senior officials from 60 countries will meet in the Polish capital Warsaw on Wednesday as the United States hopes to increase pressure on Iran, despite fears by major European nations of increasing tension with Tehran.

Jordanian Minister of Foreign Affairs and Expatriates Affairs Ayman Safadi will attend the conference announced by US Secretary of State Mike Pompeo last month for the two-day conference starting on Wednesday. Foreign ministers from around the world will come to Poland to deal with the "destabilizing influence" in the Middle East.

The meeting will be an occasion to review the unity of the nations as a strong response to Iran's religious system, which this week celebrates 40 years since the overthrow of radical Islamists of the Shah Mohammad Reza Pahlavi, a close ally to the West, and the establishment of the Islamic Republic.

The absence of foreign ministers of the two major European powers, Germany and France, highlights the tension with the European Union over US President Donald Trump's decision last year to withdraw from the nuclear deal with Iran and re-impose sanctions.

But with the presence of only a limited number of dignitaries, the United States and Poland have softened the agenda, pointing out that the conference will not focus on Iran or establish an alliance against it, but will be more interested in looking more broadly at the Middle East.

US Vice President Mike Pence will address the conference, which Pompeo is hosting.

Although the meeting is taking place in the European Union, the largest European powers will reduce their representation except Britain, which will send its Foreign Minister Jeremy Hunt, who indicated that his priorities are to talk about the humanitarian crisis caused by the Saudi-led military campaign in Yemen.

European Union Commissioner for Foreign Affairs Federica Mugherini has justified her absence for a pre-commitment, but will instead meet Pompeo in Brussels on his way to the United States.

Even the host of the conference, Poland, which seeks to strengthen its relations with the United States in the face of growing Russian influence confirmed that it remains committed to the position of the European Union in support of the 2015 agreement, which was negotiated by former US President Barack Obama to ease sanctions against Iran in return for imposing restrictions on its nuclear program.

US President Donald Trump announced his withdrawal from the deal last year, describing it as "bad" and re-imposed sanctions aimed at stifling Iran's economy and curbing its regional influence.

- Features of the Washington plan for the Middle East -

Countries which will send senior officials to Warsaw are the ones calling for tougher approaches for Iran, including Israel, whose Prime Minister Benjamin Netanyahu is participating in the conference, as well as Washington's Arab allies.

Netanyahu said that Iran would be on top of the agenda as it will discuss "how to continue preventing it from establishing its presence in Syria and preventing its hostile activities in the region and, most importantly, how to prevent it from acquiring nuclear weapons."

But the United States is expected to unveil its proposals for peace between Israel and the Palestinians in Warsaw.

Trump and his adviser Jared Kouchner, who is finalizing the "Deal of the Century" on the Middle East, will deliver a rare address at the conference on Thursday.

However, Kouchner, who is close to Netanyahu's family, is expected to reveal the proposals in the deal only after the April 9 elections in Israel.

There is no doubt that Trump's administration will have difficulties in convincing the Palestinian Authority of any agreement, as the latter remains enraged by the historic decision of 2017 to recognize disputed Jerusalem as the capital of Israel.

The Palestinian government, which described the Warsaw conference as an "American plot," rejected any talks with the United States unless the latter followed a balanced policy, as the Palestinian side put it.