ISTANBUL (AP) — Turkey’s defense ministry says the first grain ship carrying Ukrainian corn is preparing to cross through Istanbul’s Bosporus Strait and travel onto its final destination, Lebanon.

The ministry said an inspection team finished its review aboard the Sierra Leone-flagged Razoni. The delegation included officials from Ukraine, Russia, Turkey and the United Nations. The Razoni is anchored off Istanbul’s coast in the Black Sea, near the mouth of the Bosporus. The Razoni sounded its horn as the inspection teams left the ship.

The Razoni, which the United Nations says is carrying 26,527 tons of corn, set sail Monday from Odesa on Ukraine’s Black Sea coast.

Pictures tweeted by the Ministry of Defense showed an inspector reaching into an open container and touching the grain.

The ship was anchored on Wednesday near the mouth of the Bosporus Straits that connect the Black Sea to the Sea of Marmara and on to the Aegean Sea.

Inspectors, some wearing white helmets, headed out to the ship under rain in two boats, escorted by the Turkish coast guard. Turkish media said there were about 20 inspectors.

The checks aim to ensure that incoming vessels are not carrying weapons and that outgoing ones are bearing only grain, fertilizer or related food items, not any other commodities.

More ships from Ukraine are expected to set out in the coming days, raising hope that world food shortages can be alleviated. Some 27 vessels have been waiting in three Ukrainian ports with cargo and signed contracts, ready to go, according to U.N. spokesman Stephane Dujarric.

An estimated 20 million tons of grain have been stuck in Ukraine since the start of war. The U.N.-brokered agreement last month to release the grain calls for the establishment of safe corridors through the mined waters outside Ukraine’s ports.

The holdup of shipments because of the war has worsened rising food prices worldwide and threatened hunger and political instability in developing nations.

Most of the grain stuck in Ukraine is to feed livestock, according to David Laborde, an expert at the International Food Policy Research Institute in Washington. Only 6 million tons is wheat, and just half of that is for human consumption, Laborde said. He said the Razoni is loaded with chicken feed.

Ukrainian President Volodymyr Zelenskyy says the resumption of grain exports will reduce Russian authorities’ ability to extract concessions from the West. “They are losing one of the opportunities to terrorize the world,” he said in his nightly video address late Tuesday.

Russia’s war against Ukraine has also disrupted energy supplies in western Europe, with Moscow drastically cutting how much it sends amid fears it could stop sending any at all.

Meanwhile, the U.N. nuclear chief warned that Europe’s largest nuclear power plant in Ukraine “is completely out of control” and urgent steps are needed to avoid a nuclear accident.

Rafael Grossi, director general of the International Atomic Energy Agency, said in an interview Tuesday with The Associated Press that the situation is getting more perilous every day at the Zaporizhzhia plant in the southeastern city of Enerhodar, which Russian troops seized in early March, soon after their Feb. 24. invasion of Ukraine.

“Every principle of nuclear safety has been violated” at the plant, he said. “What is at stake is extremely serious and extremely grave and dangerous.”

He issued an urgent plea to Russia and Ukraine to quickly allow experts to visit the sprawling complex.

Meanwhile, Russian forces kept up their bombardment of the southern Ukrainian city of Mykolaiv, hitting it with shells twice over the past 24 hours — around 9 p.m. on Tuesday and 5 a.m. on Wednesday, governor of the Mykolaiv region Vitaliy Kim reported.

The shelling damaged a pier, an industrial enterprise, residential buildings, a garage cooperative, a supermarket and a pharmacy, Kim said. It wasn’t immediately clear if there were any casualties.

Mykolaiv is a southern port city, somewhat on par with Odesa, and is located on the Black Sea. The Russians have said in April they want control over not just eastern, but southern Ukraine, too. Taking over Odesa and Mykolaiv in the south will give them control over the entire Black Sea coast and a land corridor to the breakaway Moldovan region of Transnistria.

Amid the relentless onslaught by Moscow’s forces, Zelenskyy issued an order to all those remaining in the country’s embattled Donetsk region to evacuate as soon as possible.

The compulsory evacuation effort aims to take 200,000-220,000 people out of the eastern province by fall, officials say.