Ukrainian officials said Thursday a Russian drone attack overnight killed at least four people and injured 10 others in the eastern city of Kharkiv.

Kharkiv Mayor Igor Terekhov said drones hit several residential buildings

Oleg Sinegubov, the regional governor in Kharkiv, said Russian attacks also hit the cities of Lozova and Chuhuiv.

Russia’s Defense Ministry said Thursday it thwarted Ukrainian drone attacks targeting two regions in western Russia.

The Russian ministry said its air defenses shot down three drones over Belgorod, which borders Ukraine, as well as two drones over the Tula region.

Ukraine and Finland signed a 10-year security pact Wednesday.

The agreement makes Finland the eighth NATO member this year to agree to long-term security and defense backing for Ukraine in its fight against Russian invaders.

Finland President Alexander Stubb said his country would also send $203 million in additional military aid to Ukraine, including air defense systems and heavy-caliber ammunition. That sum took Finland’s overall defense contribution to nearly $2.2 billion during the war.

“We are not giving this military support only for Ukraine to defend itself, we are giving this military support for Ukraine to win this war,” Stubb said at a news conference with Ukrainian President Volodymyr Zelenskyy.

Some information for this article came from The Associated Press, Agence France-Presse and Reuters.