Russia launched a new wave of heavy airstrikes against Ukraine today, killing at least nine people and knocking out power in many areas, including the Zaporizhia nuclear power plant.

Attacks took place in various regions of Ukraine, including Kyiv, Odessa, Kharkiv and Lviv.

Ukrainian President Volodymyr Zelensky said infrastructure and apartment buildings in 10 regions were affected. “The occupiers can simply terrorize civilians,” he said in a statement.

Russia announced today that it had launched “massive” strikes in Ukraine in “retaliation” for a recent Ukrainian incursion into its territory, which it attributed to “saboteurs” by Kiev.

“In response to the terrorist acts of the Kiev regime in the (Russian) Bryansk region on March 2, the armed forces of the Russian Federation carried out massive retaliatory strikes,” the Russian Defense Ministry said in a statement.

The ministry said it hit Ukrainian defense companies and other “military infrastructure” with various weapons, including hypersonic Kinzhal missiles. It said it had destroyed drone bases and munitions production facilities, as well as disrupting the transport of foreign arms supplies sent across Ukraine by train. It was not immediately possible to cross-reference these claims.