LVIV, UKRAINE • Turkey’s president and the U.N. chief met with Ukrainian President Volodymr Zelensky on Thursday in a high-stakes bid to ratchet down a war raging for nearly six months, boost desperately needed grain exports and secure Europe’s biggest nuclear power plant. But little progress was reported.

The gathering, held far from the front lines in the western Ukrainian city of Lviv, near the Polish border, marked the first visit to Ukraine by Turkey’s Recep Tayyip Erdogan since the outbreak of the war, and the second by U.N. Secretary-general António Guterres.

Erdogan has positioned himself as a go-between in efforts to stop the fighting. While Turkey is a member of NATO — which backs Ukraine in the war — its wobbly economy is reliant on Russia for trade, and it has tried to steer a middle course between the two combatants.

At the meetings, Turkey agreed to help rebuild Ukraine’s infrastructure, including roads and bridges, and Zelensky asked Guterres to seek U.N. access to

Ukrainian citizens deported to Russia, according to the Ukrainian president’s website. Zelensky also requested U.N. help in freeing captured Ukrainian soldiers and medics.

On the battlefield, meanwhile, at least 17 people were killed and 42 wounded in heavy Russian missile strikes on Ukraine’s Kharkiv region on Wednesday night and Thursday morning, Ukrainian authorities said.

Russia’s military claimed that it struck a base for foreign mercenaries in Kharkiv, killing 90. There was no immediate comment from the Ukrainian side.

warplanes Heightening tensions, carrying Russia international deployed state-ofthe-art hypersonic missiles to the country’s Kaliningrad region, an enclave surrounded by two NATO countries, Lithuania and Poland.

The three leaders’ agenda included the Russian-controlled Zaporizhzhia nuclear plant in southern Ukraine. Moscow and Kyiv have accused each other of shelling the complex, and the fighting has raised fears of a nuclear catastrophe. Zelensky has demanded Russian troops leave the plant and that a team from the U.N.’S International Atomic Energy Agency be allowed in.