The ministry accused Washington of sponsoring and arming Ukraine, and warned that there would be retaliation.

It said that by providing advanced weapons to the Ukrainian armed forces, the United States has become a party to the conflict, Xinhua news agency reported.

The State Department claimed that the US-supplied ATACMS tactical missiles with cluster warheads that were used against residents of Sevastopol were targeted and coordinated by US military experts.

The attack happened around 12:15 pm. local time on Sunday and involved the use of US-supplied ATACMS tactical missiles equipped with cluster warheads, the Russian Defense Ministry said earlier in a statement.

According to the latest information, four people, including two children, have died and about 153 are injured, local media reported on Monday, quoting the head of the Sevastopol health department, Vitaly Denisov.