"We will present the victory plan, clear, specific steps for a just end to the war," he wrote.

Ukraine, which has been fending off an invasion from much larger neighbour Russia for nearly 1,000 days, has in recent months teased a plan to end the war.

The details have not been made public, but Zelenskyy presented it to U.S. President Joe Biden, as well as both major candidates running in the country's presidential election, when he visited Washington last month.

The U.S. State Department spokesman said the plan contained "a number of productive steps" which the U.S. would engage with Ukraine on.

However, the Wall Street Journal newspaper cited anonymous U.S. officials as saying that the plan was a repackaged request for more weapons and a lifting of restrictions on the use of long-range missiles, and lacked a comprehensive strategy.