KYIV, Ukraine (AP) — Russian forces escalated their attacks on crowded urban areas Tuesday, bombarding the central square in Ukraine's second-biggest city and Kyiv's main TV tower in what the country's president called a blatant campaign of terror.

"Nobody will forgive. Nobody will forget," President Volodymyr Zelenskyy vowed after the bloodshed on the square in Kharkiv.

Ukrainian authorities said five people were killed in the attack on the TV tower, which is a couple of miles from central Kyiv and a short walk from numerous apartment buildings. A TV control room and power substation were hit...