A Russian missile slammed into the center of Chernihiv in northern Ukraine on Saturday, killing at least seven people and injuring more than 100, including 12 children, Ukrainian officials said.

The missile tore through the main square just before noon, as people were leaving church after celebrating a holy day, the Ukrainian Interior Ministry said.

“A Russian missile hit the heart of Chernihiv,” President Volodymyr Zelensky said in a statement. “A square, a university and a theater. Russia turned an ordinary Saturday into a day of pain and loss.”

Ukrainian officials and emergency services released graphic videos of the initial blast in the attack and the devastating aftermath. Victims could be seen sprawled in the square, surrounded by pools of blood. The Interior Ministry said a search-and-rescue operation was underway in the surrounding area.