ZHYTOMYR, Ukraine — Russia’s ambitions to overtake southern Ukraine appeared to grow Tuesday as authorities reported the use of hypersonic missiles on the Black Sea city of Odesa and Ukrainian President Volodymyr Zelensky called on world powers to break a Russian blockade of his nation’s ports.Ukraine said firefighters were battling blazes in Odesa early Tuesday after seven missiles struck targets including a shopping center and a warehouse, killing at least one person and injuring five. Video posted on Facebook by the Ukrainian army showed rescue groups surrounded by smoking rubble. Sergey Bratchuk, a spokesman for the Odesa regional military, said in an update that a separate strike by three Kinzhal hypersonic missiles had also hit “tourism” locations in Odesa.The Kinzhal is more destructive than conventional missiles because its speed — several times that of sound — enables it to better evade anti-missile systems. Its use on Odesa could not be verified, though Russia first claimed to unleash the new weapons in March on targets in western Ukraine. Odesa, a strategic port city on the Black Sea, was targeted by Russian hypersonic missiles, Ukrainian authorities said Tuesday.(Max Pshybyshevsky / Associated Press) Citing the key role that Odesa, in the southwest near Moldova, plays in the global agricultural trade, Zelensky said in a video address that shortages of grain exports were bound to get worse if attacks continued and Western powers did not put an end to the Russian blockade of Ukrainian ports. Nations around the world depend heavily on grain from the fertile Black Sea region, which some call the “breadbasket of Europe.”“For the first time in decades there is no usual movement of the merchant fleet, no usual port functioning in Odesa. Probably this has never happened in Odesa since World War II,” Zelensky said.“Without our agricultural exports, dozens of countries in different parts of the world are already on the brink of food shortages. And over time, the situation can become downright terrible.”Ukraine is “sitting on 8 billion euros’ worth [about $8.4 billion] of wheat” that cannot be exported amid the war and Russia’s blockade of Black Sea ports, the president of the European Investment Bank, Warner Hoyer, said Tuesday.“They are sowing like crazy right now, and they will expect probably a good harvest, maybe 70% of last year’s harvest, in a couple of months,” Hoyer said. “And then what to do with it?”On the other side of Ukraine, in the southeast, officials said Tuesday that Russian attacks continued to hit the port city of Mariupol, where dramatic scenes have unfolded in the last week of civilians rescued from a vast steelworks where they and a group of fighters were sheltering. Russian President Vladimir Putin, accompanied by military brass, attends a wreath-laying ceremony after a military parade in Moscow on Monday.(Anton Novoderezhkin / Kremlin Pool Photo) Petro Andryushchenko, an advisor to the mayor, said on Telegram that he believed 100 people remained in the Azovstal steel complex’s underground tunnels. Andryushchenko said that the area was still under fire Tuesday.The situation in the plant has been hard to ascertain even for Ukrainian authorities, who in earlier days said they believed all or most civilians had been evacuated.Mariupol, under near-total Russian control, was the site Monday of a Russian military observation of Victory Day, a Russian holiday marking the Soviet triumph over Nazis during World War II.Some analysts had predicted that Russian President Vladimir Putin, who presided over a highly orchestrated celebration in Moscow complete with military marches and music, would use the occasion to declare all-out war on Ukraine. Instead, he lashed out against the North Atlantic Treaty Organization and the U.S., saying Russia was responding to “aggression” by Western powers.In Mariupol, Andryushchenko said that while Russian troops held celebratory exercises in the city, “no excitement or joy on the street was particularly noticeable. … Something went wrong with the holiday because Mariupol is Ukraine, not Moscow.”With Moscow having declared victory over Mariupol — which would give it one piece of a desired land corridor linking Russian, Crimea and western Ukraine — and military gains somewhat stalled along the eastern Donbas battlefront, American and British military analysts say attacks on Odesa and the west could increase as a way to lure Ukrainian firepower from the east.In the nation’s northeast around Kharkiv, which has been under near-daily assault since the beginning of the war but remains in Ukrainian control, a local leader said Tuesday that bodies were still being recovered from attacks in March.Regional administrator Oleh Sinegubov said in a Telegram post that dozens of bodies were found in Izyum in the rubble of a residential building that collapsed under missile fire in March. Izyum is about 75 miles from Kharkiv, which is the second-largest city in Ukraine.“This is another horrible war crime of the Russian occupiers against the civilian population,” Sinegubov said.Air-raid sirens were also reported to have sounded Tuesday in Luhansk and Dnipro. In a social media post, Luhansk Gov. Serhiy Haidai said the region was hit with Russian attacks 22 times over the last day. Newsletter Must-read stories from the L.A. Times Get the day’s top news with our Today’s Headlines newsletter, sent every weekday morning. Enter email address Sign Me Up You may occasionally receive promotional content from the Los Angeles Times. “The Russians fired en masse on all possible routes out of the region,” Haidai said.Zelensky, who since March has received various Western leaders eager to show their support for Ukraine, including House Speaker Nancy Pelosi (D-San Francisco), hosted the foreign ministers of Germany and the Netherlands on Tuesday.German Foreign Minister Annalena Baerbock toured Kyiv and bombed-out suburbs, including Irpin, with Dutch Foreign Minister Wopke Hoekstra.The visit by Baerbock, the first German government official to travel to Ukraine since the war began Feb. 24, could mark a shift in a tense relationship that has seen Kyiv accuse Berlin of being too slow to send military aid and to formulate a ban on Russian energy imports. Germany is among the European Union nations with the strongest trade relationships with Russia. Pro-Russia militiamen patrol a street during a celebration of the 77th anniversary of the end of World War II in Mariupol, Ukraine.(Alexei Alexandrov / Associated Press) In April, Kyiv said German President Frank-Walter Steinmeier was not welcome to visit. Last week, Zelensky relented and invited Steinmeier and German Chancellor Olaf Scholz to the capital.Speaking in Bucha, the suburb where the discovery of mass graves last month brought international condemnation of Russia, Baerbock said Germany was committed to supporting Ukraine.“We owe it to the victims that we don’t just commemorate them here but that we hold the perpetrators to account,” she said.Zelensky also spoke via video Tuesday to the Slovakian parliament. He repeated a warning he has given other nations that Russia’s ambitions do not stop at Ukraine’s borders.“If we fail to stop the Russian troops, they will come everywhere they can, including to the territory of Slovakia,” Zelensky said.The war has caused nearly 6 million Ukrainians to flee for other nations, the United Nations said Tuesday. Eight million have been displaced internally.The U.N. has confirmed at least 3,381 civilian deaths during the war. Speaking Tuesday at a news conference in Geneva, the head of the U.N. Human Rights Mission in Ukraine said the real number is substantially higher.“We have been working on estimates, but all I can say for now is that it is thousands higher than the numbers we have currently given to you,” Matilda Bogner said.King reported from Zhytomyr and Kaleem from London.