Ukrainian grain mogul and his wife were killed after the southern city of Mykolaiv came under intense shelling on Sunday, according to Ukrainian officials, as Russian President Vladimir Putin used his nation’s Navy Day to issue more militaristic threats to anyone undermining Russia’s “sovereignty and freedom.” 

Grain tycoon Oleksiy Vadaturskyy and his wife, Raisa, died in the attack, according to a statement from Ukrainian President Volodymyr Zelensky. Vadaturskyy was the founder of Mykolaiv-based Nibulon, one of Ukraine’s largest grain producing and export companies.

The businessman’s death was a “great loss for Mykolaiv … and all of Ukraine,” Zelensky said. “For more than 50 years of his career, Oleksiy Vadaturskyy made an invaluable contribution to the development of the region and the development of the agricultural and shipbuilding industries of our country.”

Mykolaiv Mayor Oleksandr Senkevych said cluster munitions blew out windows and destroyed balconies. “Mykolaiv was under mass shelling today. Probably the strongest one of all time,” he said in a statement. 

In a speech commemorating Russia’s Navy Day in Saint Petersburg, Putin did not make any mention of Russia’s war in Ukraine, but said his country’s “current situation is demanding very decisive actions.”