(Reuters) - U.S. Republican presidential candidate Donald Trump is ready to act "immediately" as a peace broker in the Russia-Ukraine war if he is elected in November, Hungarian Prime Minister Viktor Orban has said in a letter to EU leaders.

The letter, addressed to European Council President Charles Michel and shared with all EU leaders, was drafted after Orban held talks with Trump as well as with the leaders of Ukraine, Russia and China.

"I can (...) surely state that shortly after his election victory, he will not wait until his inauguration, (Trump) will be ready to act as a peace broker immediately. He has detailed and well-founded plans for this," Orban wrote.

(Reporting by Reuters)