Donald Trump’s administration has threatened allies with consequences if they attend an upcoming UN conference on a possible two-state solution between Israel and Palestine.

The diplomatic demarche, sent on Tuesday, says countries that take “anti-Israel actions” following the conference will be viewed as acting in opposition to US foreign policy interests and could face diplomatic consequences from Washington, Reuters reported.

France and Saudi Arabia are co-hosting the gathering next week in New York that aims to lay out the parameters for a roadmap to a Palestinian state, while ensuring Israel’s security.

“We are urging governments not to participate in the conference, which we view as counterproductive to ongoing, lifesaving efforts to end the war in Gaza and free hostages,” read the cable.

Emmanuel Macron has suggested France could recognise a Palestinian state in Israeli-occupied territory at the conference. French officials say they have been working to avoid a clash with the US, Israel’s staunchest major ally.