Russian strikes killed 16 people and injured more than 40 in Kyiv and the surrounding region on Thursday as Ukrainian President Volodymyr Zelensky said a failure by Ukraine's allies to replenish its stock of air defense missiles was costing lives.

Ukraine's air force said Russia launched dozens of missiles and 168 drones in the overnight attack.

The air force said that nearly 90% of the drones and most of the cruise missiles were downed. It did not specify how many ballistic missiles were launched and whether any were intercepted.

The upper floors of a nine-story residential block were destroyed in Kyiv's Solomianskyi district, where the majority of the 15 deaths in the capital occurred, Mayor Vitali Klitschko said. He called for Friday to be observed as a day of mourning.

Two other districts suffered damage, Klitschko said, with a school and a children's hospital hit as well as non-residential facilities and warehouses.