The Ukrainian Defense Ministry said it destroyed 37 Iranian-made Shahed-136s — known as "kamikaze" drones — overnight Sunday and on Monday.
"In the past 13 hours, #UAarmy shot down 37 Iranian Shahed-136 drones and 3 cruise missiles launched by Russian terrorists," the ministry said on Twitter.
Russian forces struck Ukraine with a flurry of deadly "kamikaze" drone attacks early Monday.
The strikes, including the ones in Kyiv, were all launched from southern Ukraine, according to the Ukrainian Air Force.
Ukrainian forces said they hit 11 Shahed-136s in northern and central regions of the country.
Nine of the drones were shot down by anti-aircraft missile units and fighter aircraft by the Air Force while two were destroyed by the Land Forces, the statement added.
Earlier, the Air Force said 26 drones were downed in the south of the country.
Some context: Russia has ordered 2,400 "kamikaze" drones from Iran, according to Ukrainian President Volodymyr Zelensky.
They are capable of carrying precision-guided missiles and have a payload of approximately 50 kilograms (110 pounds).
Drone attacks in the east of Ukraine had targeted crucial infrastructure, the Air Force said.
Last week, Moscow launched a spate of fatal strikes targeting the Ukrainian electrical grid, leading to widespread power outages.