ISTANBUL

Ukraine said on Monday that at least 11 people were killed in a Russian missile attack in the city of Sumy.

A statement by the Sumy Regional Military Administration said on Telegram that 84 people were also injured, including 11 children, in the attack on the region's administrative capital, located about 31 kilometers (19.2 miles) from the Russian border.

The statement said 11 of those injured are in intensive care, six of which are children.

"Sunday evening for the city of Sumy became hell, a tragedy brought to our land by Russia," Sumy Governor Volodymyr Artyukh was quoted as saying by the administration late Sunday.

Separately, Ukraine’s State Emergency Service later said the number of those injured increased to 89 people.

Meanwhile, the Sumy Prosecutor General's Office said on Telegram that 13 buildings, including 90 apartments, as well as two educational institutions were damaged by the attack.

It further said that Monday and Tuesday will be declared as days of mourning.

Ukraine’s Air Force claimed that Russia attacked the region with two Iskander-M ballistic missiles launched from the Voronezh region and a Kh-59 guided air missile from the Kursk region.

Russian authorities have yet to comment on the claim.