Ukrainian President Volodymyr Zelenskyy plans to visit Turkey this week to revive talks on ending Russia's invasion, which began nearly four years ago.

Oil prices settled higher on Tuesday after a choppy session as traders weighed the impact of Western sanctions on Russian oil flows, as well as U.S. President Donald Trump saying his administration had started interviewing for the next Federal Reserve chair.

Elsewhere, the president of Finland warned that a ceasefire in Ukraine is unlikely before the spring and urged European allies to keep up support.

An earlier proposed Trump-Putin summit in Hungary was scrapped when it became clear Russia would not agree to the U.S. president's demand for an immediate ceasefire in the Ukraine war.

Zelensky said that he would be in Turkey on Wednesday, a day after visiting Spain where he hoped for pledges of new support on Tuesday.

KYIV, Ukraine (AP) — Ukraine is working to resume prisoner exchanges with Russia that could bring home 1,200 Ukrainian prisoners, President Volodymyr Zelenskyy said Sunday, a day after his national security chief announced progress in negotiations.

A full-scale invasion of Poland, in the manner Russia invaded Ukraine, is rather not viable, given Russia's current military capacities, Poland's military build-up and the collective defense guarantees of NATO membership, Michnik said, "however, this reality must not diminish Poland’s ongoing preparation."

A Russian national, now in Azerbaijan, is suspected of coordinating a 2024 parcel plot targeting air cargo planes in Europe.