Russia-Ukraine updates: Russian missiles hit close to nuclear reactors: IAEA director

The first ship carrying Ukrainian grain departed Odesa on Monday morning under an internationally brokered deal attempting to ease a global hunger crisis.

The Sierra Leone-flagged cargo ship Razoni left the Ukrainian port city and is headed to Lebanon, a tiny Mideast nation that imports nearly all of its grain and lacks storage space after a 2020 explosion destroyed grain silos at its main port in Beirut. The vessel is expected to reach Istanbul on Tuesday, where it will be inspected before being allowed to proceed to Tripoli, according to a statement from the Turkish Ministry of National Defense.

Razoni, which is carrying 26,527 tons of corn, is the first commercial ship to set off from Ukraine's port of Odesa since Feb. 26 and the first vessel to depart under the so-called Black Sea Grain Initiative, according to a statement from the spokesperson for the the United Nations secretary-general. Last month, Russia and Ukraine signed separate agreements with Turkey and the U.N. to allow Ukraine to resume its shipment of grain from the Black Sea to world markets and for Russia to export grain and fertilizers.

Since Russian forces invaded neighboring Ukraine on Feb. 24, the cost of grain, fertilizer and fuel has skyrocketed worldwide. Russia and Ukraine -- often referred to collectively as Europe's breadbasket -- produce a third of the global supply of wheat and barley, but a Russian blockade in the Black Sea combined with Ukrainian naval mines have made exporting siloed grain and other foodstuffs virtually impossible. As a result, millions of people around the world -- particularly in Africa and the Middle East -- are now on the brink of famine.

In a televised address to his nation, Ukrainian President Volodymyr Zelenskyy described the Russian shelling Sunday of Mykolaiv in southern Ukraine as "one of the most brutal" in the five-month war.

Zelenskyy said the missile attacks hit residential buildings, schools, industrial facilities and other social infrastructure.

He also expressed condolences over the deaths of billionaire Ukrainian farmer Oleksiy Vadaturskyy and his wife, Raisa, who died when a missile struck their home in Mykolaiv.

Zelenskyy called Vadaturskyy, founder of one of the largest Ukrainian agricultural companies, "the hero of Ukraine."

"It is exactly such people, such companies, our Ukrainian south that have guaranteed the world's food security. It has always been so. And it will be so again," Zelenskyy said. "The Russian terrorists should not even hope that they will be able to destroy the social and industrial potential of Ukraine and walk through the ruins."

Zelenskyy said the Russian army is attempting to strengthen its positions in the occupied areas of the south by moving part of its forces to the Kherson and Zaporizhzhia regions there from the east.

"But this will not help them there," Zelenskyy said. "None of the Russian strikes goes unanswered by our military and intelligence officers. The Armed Forces of Ukraine are ready to respond to any new activity of the occupiers."

Zelenskyy added, "Strategically, Russia has no chance of winning this war. And it is necessary to hold on, so that even at the tactical levels, the terrorist state feels its defeat. We have to hold on in the south, in the east and everywhere."

Photos show the destruction caused when a small Ukrainian drone loaded with explosives struck the headquarters of the Russian Black Sea fleet in Crimea.

Russian military officials said at least five people were wounded in the attack Sunday in Sevastopol.

Russian media posted photos showing light debris scattered around an entrance to the building in Sevastopol.

Other photos showed Sevastopol Gov. Mikhail Razvozhayev standing outside the Russian Black Sea Fleet headquarters inspecting the damage.

The Black Sea Fleet's press service reported that the drone explosive appeared to be homemade and described it as a “low-power” device, according to The Associated Press. It was not immediately clear where the drone was launched from.

The attack appears highly symbolic, coming as Russia marks Navy Day and showing Ukraine’s reach to strike targets in Crimea.

Putin is attending a huge naval parade in St Petersburg Sunday. Following the strike, all celebrations in Sevastopol were reportedly canceled.

-ABC News' Patrick Reevell

A billionaire Ukrainian farmer who plays a crucial role in the country's agricultural industry was killed when a Russian missile struck his mansion just as Ukrainian grain shipments are about to resume.

Oleksiy Vadaturskyy, one of Ukraine’s richest men, died when a Russian missile struck a wing of his large home in the southern city of Mykolaiv, officials said.

Mykhailo Podolyak, a top aide to Ukrainian President Volodymyr Zelenskyy, accused Russia of deliberately targeting Vadaturskyy.

Video from the scene of the missile strike shows one wing of the large mansion collapsed.

"Vadaturskyy was one of the largest farmers in the country, a key person in the region and a large employer," Podolyak said. "The accurate hitting of the missile not just in the house, but in a specific wing -- the bedroom -- leaves no doubts about the guidance and correction of the impact. Once again: Vadaturskyy was made a specific target."

Podolyak alleged the killing of Vadatursky is part of a deliberate wave of atrocities aimed at breaking Ukrainian morale, including the alleged massacre of POWs.

"Every crime makes us feel pain, but we live it and only become more hardened,” Podolyak said.

The death of Vadaturskyy, who Podolyak said had direct relations to the grain industry, came after Zelenskyy visited Odesa on Friday to watch crews load ships with grain that has been trapped by Russia’s five-month-old war.

Ukraine is a top global exporter of wheat, sunflower oil, corn and barley and its inability to export its agricultural products has led to a spike in food prices worldwide and exacerbated a global food crisis.

-ABC News Patrick Reevell