Russia said on Thursday that its forces had carried out a "massive retaliatory strike" on Ukrainian infrastructure after what it called a terrorist attack in Russia's Bryansk region, which borders Ukraine, last week.
Ukraine said at least six civilians were killed in the first big volley of Russian missile strikes since mid-February,
The Russian defence ministry said in a statement that it hit Ukrainian defence companies and other "military infrastructure" with a range of weapons including Kinzhal hypersonic missiles.
