Russia launched the largest single drone attack on Ukraine

While many were repelled, emergency services reported drone strikes causing destruction and fires in several regions overnight.

The strikes come on the eve of the third anniversary of the start of Russia's full-scale invasion of Ukraine.

Ukrainian President Volodymyr Zelensky said it was the largest drone attack on the country since Russia began using Iranian-made drones.

He said in a statement that this week Russia had launched nearly 1,150 attack drones, more than 1,400 guided aerial bombs and 35 missiles of various types at Ukraine.

"We must do everything possible to bring a lasting and just peace to Ukraine," Zelensky wrote.

"This is achievable through the unity of all partners - we need the strength of all of Europe, the strength of America, the strength of everyone who seeks lasting peace."

The drones were reported to have been used initially to attack military targets in the Kharkiv region, but have since been used to target population centres and energy infrastructure.

Iran has previously said it only supplied a "small number" of drones to Russia before the war, but the US and EU have accused Iran of sending regular deliveries of drones to Russia.