The White House says it has secured an agreement with Russia and Ukraine on the Black Sea, to ensure safe navigation, eliminate the use of force and prevent the military use of commercial vessels.
The closed-door talks at the Ritz-Carlton Hotel in Riyadh follow U.S. consultations with a Ukrainian delegation on stabilizing the front lines and implementing a proposed 30-day armistice.
The number of troops that would help enforce a peace in Ukraine is vague. Officials have cited figures of between 10,000 and 30,000 troops as part of what's been termed a "reassurance force."
Ukrainian President Volodymyr Zelenskyy spoke for about an hour with President Trump on Wednesday, following Trump's call on Tuesday with Russian President Vladimir Putin.
President Trump has said he wants to broker an end to Russia's war in Ukraine. This was his second call with Russian President Vladimir Putin on the issue.
Ukraine's president said he hopes the U.S. applies "maximum additional sanctions" on Russia if it refuses to accept a 30-day ceasefire, describing the Russian leader's "bravado" as a stalling tactic.
The meeting came days after Iran rebuffed President Trump's proposal for nuclear talks. Trump sent a letter calling for Iran to either enter into negotiations or face possible military action.
Russia's president welcomed the idea of a ceasefire but warned Ukraine might use a 30-day truce to regroup and questioned how it would be enforced, as President Trump's envoy visited Moscow.