Israelis and Palestinians should avoid any moves until US peace plan is revealed, White House adviser says.

Israel should wait to see Donald Trump's Middle East peace plan before proceeding with any plans to annex West Bank settlements, the US president's senior adviser Jared Kushner said.

Speaking at a dinner of the Washington Institute for Near East Policy on Thursday, Mr Kushner said the peace proposal he had been putting together would be released soon and that Israel and the Palestinians should examine its contents before taking further steps.

"I hope both sides will take a real look at it, the Israeli side and the Palestinian side, before any unilateral steps are made," he said.

"What we will be able to put together is a solution that we believe is a good starting point for the political issues and then an outline for what can be done to help these people start living a better life," said Mr Kushner, who is married to Mr Trump's daughter Ivanka.

Palestinians are sceptical about any US proposals after a series of pro-Israel moves by Mr Trump's administration and the tough line he has taken toward them, cutting off aid and ordering the closure of the PLO's office in Washington.

"I was given the assignment of trying to find a solution between the two sides and I think what we'll put forward is a framework that I think is realistic ... it's executable and it's something that I do think will lead to both sides being much better off," Mr Kushner said.