President Trump revealed Wednesday that he had a “lengthy and highly productive” conversation with Russian President Vladimir Putin, followed by a call to Ukrainian President Volodymyr Zelenskyy, as Mr. Trump moved to fulfill a campaign pledge to quickly halt the fighting in the nearly three-year war.

Mr. Trump said he and Mr. Putin talked primarily about the war, but also discussed the Middle East, energy, artificial intelligence, the dollar and other topics.

Russia’s Tass news service said the Kremlin had confirmed the phone conversation — the first known direct contact between the two leaders since Mr. Trump took office last month. The Russians offered few details on the call, saying only that it lasted nearly 90 minutes and that the two leaders had agreed to “hold an in-person meeting” in the near future, according to Kremlin spokesman Dmitry Peskov.

Ukrainian media, citing a statement from the presidential office, confirmed that Mr. Trump and Mr. Zelenskyy had conferred by phone Wednesday as well.

Mr. Trump wrote that he and Mr. Putin “agreed we want to stop the millions of deaths taking place in the War with Russia/Ukraine,” Mr. Trump wrote. ” … We both believe very strongly in it. We agreed to work together, very closely, including visiting each other’s Nations.”

He said he and Mr. Putin agreed to “work together very closely” and to start negotiations to end the Russia-Ukraine war.

He said in his post that he was calling Mr. Zelenskyy to let him know of the conversation and that Secretary of State Marco Rubio, CIA Director John Ratcliffe, National Security Advisor Michael Waltz and Middle East envoy Steve Witkoff would be leading the negotiations.

“Millions of people have died in a War that would not have happened if I were President, but it did happen, so it must end,” he said. “No more lives should be lost! I want to thank President Putin for his time and effort with respect to this call, and for the release, yesterday, of Marc Fogel, a wonderful man that I personally greeted last night at the White House. I believe this effort will lead to a successful conclusion, hopefully soon!”

• Mallory Wilson can be reached at mwilson@washingtontimes.com.