Russian officials say they have foiled a Ukrainian attack on a border city as the aerial war between the two nations continues to intensify.
The officials said a dozen missiles were downed before they could reach Belgorod, where 25 people were killed on Saturday. Ukraine has not commented.
The attacks come after Russia launched its biggest aerial bombardment yet.
Ukraine's President Volodymyr Zelensky says Russia has used some 300 missiles and 200 drones over five days.
Russia's renewed aerial bombardment on Ukraine began late last week. Ukrainian forces responded with Saturday's attack on Belgorod in which more than 100 people were also injured.
In his nightly address, he said Russia had fired "almost one hundred missiles of various types" on Tuesday. They had, he said, been "specifically calculated by the enemy to cause as much damage as possible".