KYIV (Reuters) -Ukraine's military said on Wednesday it struck several Russian weapon production sites during a major overnight drone attack that Moscow said its air defences had repelled. Both sides have conducted aerial attacks on targets far behind the front lines where fighting rages more than three years since Russia's full-scale invasion of Ukraine. The latest attack struck Russia's Kronstadt plant, which produces drones in the town of Dubna outside Moscow, and the nearby Raduga plant that makes cruise missiles, Ukraine's general staff said.