New Delhi: An Indian employee was killed and three were injured in a major drone strike by Ukraine in the Moscow region on Sunday, the embassy informed.“An Indian employee lost his life and three others were injured in a drone strike in the Moscow area this morning. Embassy officials visited the site and met the injured workers in the hospital. The embassy condoles the loss of life and is working with company management and local authorities to provide necessary assistance to the workers,” a post on Twitter said.Ukrainian President Volodymyr Zelensky said Kiev’s attack on Russia was “completely justified”, coming just days after a massive Russian drone and missile attack on the Ukrainian capital that killed at least 24 people.He said, “Our reactions to Russia’s prolongation of the war and its attacks on our cities and communities are fully justified. This time, Ukrainian long-range sanctions reached the Moscow region, and we are telling the Russians clearly: their state must end its war.”Russian officials said about 600 Ukrainian drones targeted the country overnight, killing four people, in what Ukrainian President Volodymyr Zelensky described as “completely justified” retaliation for Russia’s continued attacks on Ukraine. Russia’s Defense Ministry said air defense systems destroyed 556 drones overnight, while another 30 were intercepted after daybreak, making it one of the largest Ukrainian drone attacks of the war so far. The ministry said the interception occurred in 14 Russian territories, as well as Russia-annexed Crimea off Ukraine and the Black and Azov Seas.