The Mecca summit condemned the transfer of US embassy to Al-Quds and urged members to boycott all countries that have opened diplomatic missions in the city.

Iran Press/Middle East: The 57-member Organization of Islamic Cooperation (OIC) on Saturday slammed the US and Guatemala decision to transfer their embassies to Al-Quds and recognize the disputed city as their capital.

The Saudi-hosted summit also urged all members to boycott countries that have opened diplomatic missions in the city, a statement said according to the Sputnik. 

The statement comes as US President Donald Trump's son-in-law Jared Kushner prepares to roll out economic aspects of his long-awaited Middle East peace plan at a conference in Bahrain later this month.

The plan, dubbed by Trump as the 'Deal of the Century', has already been rejected by the Palestinians, who say Trump's policies have shown him to be blatantly biased in favour of Israel.

Palestinians have cut off all contacts with the Trump administration after US decision to transfer their embassies to Al-Quds and in December 2017.

Iran's President Hassan Rouhani had his own message for OIC leaders ahead of the summit, urging them to stay focused on the rights of Palestinians.

In a letter published online Friday, Rouhani said Muslim leaders should not let the importance of Palestinian statehood be "marginalized" in the face of the Trump administration's forthcoming peace plan.

Rouhani also expressed his country's readiness to work with all Muslim leaders to confront the White House's so-called Deal of the Century. 101/205

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