US President Donald Trump will recognise Jerusalem as Israel’s capital, senior administration officials have said.
He is due to announce the controversial decision in a speech later.
Mr Trump is also expected to approve moving the US embassy from Tel Aviv to Jerusalem, but not for several years.
Israel welcomes the changes but the Palestinians and Arab leaders have warned they will jeopardise any Middle East peace process.
The Palestinians’ UK representative, Manuel Hassassian, told the BBC the changes would be the “kiss of death” to the two-state peace solution and amounted to declaring war in the Middle East.
Israeli Prime Minister Benjamin Netanyahu has yet to comment officially but Education Minister Naftali Bennett called on other countries to follow Washington’s lead.
“Jerusalem has been and always will be the eternal capital,” he told the Jerusalem Post Diplomatic Conference.
Pope Francis called for the “status quo” to be respected. Dialogue would only come through “recognising the rights of all people” in the region, he said.
And UK Foreign Secretary, Boris Johnson, said he viewed the reports of what Mr Trump would say “with concern”.
Israel has always regarded Jerusalem as its capital city, while the Palestinians claim East Jerusalem as the capital of a future Palestinian state.
In recognising Jerusalem as Israel’s capital, the US becomes the first country to do so since the foundation of the state in 1948.
What is so contentious about Jerusalem’s status?
The issue goes to the heart of Israel’s conflict with the Palestinians, who are backed by the Arab and wider Islamic world.
The city is home to key religious sites sacred to Judaism, Islam and Christianity, especially in East Jerusalem.