At least six people have been killed and 27 others injured in Russian missile strikes on a recreational area near the city of Kharkiv in eastern Ukraine.
Kharkiv's mayor Ihor Terekhov spoke on Sunday of "terror against peaceful residents, against our right to life, against everything human and just." A pregnant woman was among the dead, he said.
The Kharkiv region, which borders Russia, has been under massive shelling for weeks. Ukrainian media published graphic images of the scene, where people are said to have been relaxing when the missiles struck.
Authorities continually warn of the dangers in the war zone, sounding air alarms and advising people to seek safety during attacks.
The Ukrainian General Staff reported an escalation of hostilities in the region on Sunday. The media reported that thousands of people had been evacuated to safety.
Ukraine has been defending itself against a Russian invasion for more than two years. Russia had recently expanded its offensive to the Kharkiv region.
President Vladimir Putin has stated that Moscow aims to establish a buffer zone to prevent attacks on Russian territory from Kharkiv.
The Russian border regions have also been under increased attack from Ukrainian forces for months, aiming to disrupt Moscow's supply routes.