Asked if he was concerned about the prospect of a nuclear attack by CNN, Mr Zelensky said: “Not just me – the whole world, all countries should be concerned.” He added: “Chemical weapons … They could do it, for them human life [is] nothing. Here’s why. We must think not to be afraid, not to be afraid but to be ready. “But this is not an issue for Ukraine, not just for Ukraine but for the whole world, I think.” Zelensky said about 2,500 to 3,000 Ukrainian soldiers have been killed so far and another 10,000 wounded in the conflict. However, the number of civilians killed is uncertain. He said: “It is very difficult to talk about civilians, since in the south of our country, where the cities are blocked – Kherson, Berdyansk, Mariupol to the east and the area to the east where Volnovaka is – we just do not know how many people have died in this excluded area. “ He also spoke about the recent sinking of the Russian warship Msokva. The Ukrainian leader said the sinking was not a “tragedy” for them, as he acknowledged that the fewer weapons the Russian Federation has, the better for them. The governor of the Odessa region of Ukraine Maksym Marchenko said that his country’s forces hit the ship with two Neptune anti-ship missiles. Russia says flagship of its warship sank after ammunition exploded Russia claimed that all 500 crew members were rescued on Wednesday. Ukrainian officials said some of the passengers died, including the ship’s captain. The Russian Federation has suffered damage to two key naval assets – the Moskva and the Alligator Saratov – class ship since it invaded Ukraine, the London Defense Ministry said. On Friday, Britain’s defense chiefs said Russia was likely to reconsider its position on the Black Sea after the incident.