"Russia doesn`t change its stripes," Ukrainian President Volodymyr Zelenskyy said.
Zelenskyy, as well as the Ukrainian Interior Ministry and the general prosecutor's office, said three emergency workers were killed in Kyiv while responding to the Russian strikes. "They were working under fire to help people," the Interior Ministry said in a statement.
Kyiv mayor Vitali Klitschko earlier said four people were killed. His office did not immediately respond to a request for clarification.
The war has continued unabated even as a U.S.-led diplomatic push for a settlement has brought two rounds of direct peace talks between delegations from Russia and Ukraine. The negotiations delivered no significant breakthroughs, however, and the sides remain far apart on their terms for an end to the fighting.