India, April 13 -- Ukraine President Volodymyr Zelenskyy on Sunday claimed 31 people, including children, died after a Russian ballistic missile hit Sumy city.

He said more than 84 people were injured in the attack.

"As of now, 31 people are known to have been killed in Sumy by the Russian ballistic missile strike. Among those killed were two children. My condolences to the families and loved ones. More than 84 people have been wounded, including 10 children. All of them are receiving the necessary assistance," Zelenskyy wrote on X.

'World should not stay silent'

Zelenskyy urged the world to break silence on Russia and its acts against Ukraine.

He wrote on X: "It is crucial that the world does not stay silent or indifferent. Russian ...