MOSCOW (AP) — U.S. President Donald Trump and Russian President Vladimir Putin said they will speak by phone Thursday, their sixth publicly disclosed chat since Trump returned to the White House this year. Trump said in a social media post the call will take place at 10 a.m. EDT. Neither leader offered any immediate details on the topic.

Donald Trump had a call with both President Zelensky and President Vladimir Putin to initiate discussions aimed at ending the war in Ukraine.

Trump’s call with Putin was scheduled for today at 10 a.m. ET, with a subsequent conversation with Zelensky on Friday. Trump has previously expressed hope that the talks could result in a ceasefire, but his attempts at negotiations between Russia and Ukraine have failed to yield significant progress.