US President Donald Trump's long-awaited plan for Israel-Palestinian peace will be presented after April's Knesset election, Jared Kushner has said.

The president's son-in-law and senior adviser said during a Middle East security conference in Warsaw that both sides will have to make compromises under the proposals in the plan.

Mr Kushner said it will be unveiled after the April 9 election in Israel, according to Barak Ravid, a correspondent for Channel 13 News.

The Trump administration has made much in the past of intentions to present a comprehensive peace plan.

The president’s son-in-law has been working with his special representative and long-serving attorney Jason Greenblatt on the plan since Mr Trump took office in January 2017.

BREAKING: Jared Kushner at Warsaw conference: We will present the U.S. Israeli-Palestinian peace plan after the April 9th elections in Israel - both sides will have to make compromises

— Barak Ravid (@BarakRavid) February 14, 2019

But little is known of the proposals it will contain, although Nikki Haley, the former US representative to the United Nations, once said that it “won’t be loved and won’t be hated”.

Both Israelis and Palestinians have expressed little hope that the plan will succeed.

Palestinian President Mahmoud Abbas has already rejected any plan that is brokered by Mr Trump after his decision to recognise Jerusalem as Israel's capital.

“The Palestinians, I think, are wanting to come back to the table very badly,” Mr Trump said in March 2018.

“If they don’t, you don’t have peace, and that’s a possibility also. I’m not saying it’s going to happen.

“Everybody said this is the hardest deal to make of any deal.”