At least 43 people, including 12 children, have been injured after a missile struck the carpark of a residential building in Ukraine's Kharkiv region, local officials say.
What is believed to be a Russian Iskander missile landed in the town of Pervomaisky at about 13:30 local time.
A one-year-old and a 10-month-old were reportedly among the injured.
Mr Kostin said targeting the residential buildings amounted to another war crime from Russia.
Oleg Sinegubov, the Kharkiv regional governor posted several pictures of the damaged building to Telegram. They showed smashed windows, dark smoke clouds and an overturned car.
"At least half of the neighbourhood is in an uninhabitable state," Anton Orekhov, the chairman of Pervomaiskyi was quoted as saying by local media.
Russia has not immediately commented on the incident, and Moscow has previously denied targeting civilians.