President Donald Trump said an agreement being reached with Saudi Arabia for a civilian nuclear programme requires the kingdom to normalise relations with Israel through the Abraham Accords.
In a post on social media, the Republican president said the deal does not allow for enrichment of uranium.
Non-proliferation experts have raised concerns that the deal fails to include guardrails to prevent enrichment of uranium to weapons-grade levels.
Mr Trump’s post said the agreement “will be approved, but is totally subject to Saudi Arabia joining the very respected and successful Abraham Accords”.
He added that “The United States is not opposed to Civil (Non-Enriched) Nuclear Facilities”.
The Saudis have made clear that they will not normalise relations with Israel until a pathway for Palestinian statehood is established, and Israeli prime minister Benjamin Netanyahu has made clear that is not in the offing.
Mr Trump has sought to build on the 2020 agreements, which expanded the number of Arab states with diplomatic ties with Israel.
The deal is expected to last 30 years and involve US firms in the programme’s development.
It could allow for the building of a uranium enrichment facility in Saudi Arabia following a joint US-Saudi study.
The agreement is expected to be submitted to Congress for review.