Russian missiles hit industrial facilities at a strategic city in southern Ukraine Sunday as Moscow continued efforts to expand its gains in the country’s east. Moscow also said it shot down a Ukrainian MI-17 helicopter and a SU-25 aircraft.

Mykolaiv Mayor Oleksandr Senkevych said that the Russian missiles struck an industrial and infrastructure facility in the city, a key shipbuilding centre in the estuary of the Southern Bug river. There was no immediate information about casualties. Mykolaiv has faced regular Russian missile strikes in recent weeks as the Russians have sought to soften Ukrainian defences.