Dramatic video footage of the attack shows dozens of bomblets exploding within seconds of each other near to the seafront.

Russian missile, artillery and laser-guided bomb strikes across a wide swathe of Ukraine from Sumy in the northeast to Odessa in the southwest killed seven people injured at least 36, authorities said.

Zaporizhzhia, Chernihiv, Mykolaiv, Luhansk, Dnipropetrovsk, Sumy, Odesa, Kherson, Kharkiv, and Donetsk. Casualties were reported in the latter four regions.