Ukrainian President Volodymyr Zelensky said that Russia attacked most of Ukraine on August 26, firing a series of missiles and drones, killing four people, injuring more than a dozen and damaging the country's energy facilities.
The attack of more than 100 missiles and about 100 drones began around midnight and continued into the morning - Russia's apparently biggest attack in weeks, the AP reported.
The Ukrainian Air Force said the Russian drones fired at eastern, northern, southern and central regions, followed by a series of cruise missiles and ballistic missiles.
Like most previous attacks, this one is as fierce, Zelensky said, noting that most countries were targeted from Kharkiv, Kiev to Odessa and western Ukraine.
Several explosions were heard in the capital Kiev. Vitali Mayor Klitschko said the city's power and water supply was interrupted after the attack.
Ukrainian Prime Minister Denys Shmyhal said Russia had fired cruise missiles, Kinzhal hypersonic ballistic missiles and drones into 15 areas of Ukraine - more than half of the country's territory.
He said that Ukraine's allies would provide the country with long-range weapons and allow them to be used to attack targets inside Russia.
The Russian Defense Ministry said the strikes used high-precision aerial and sea weapons and drones to target critical energy infrastructure that supports the operation of the Ukrainian military-industrial complex. All designated targets were hit.
Poland and NATO air defense systems were activated east of Poland following the Russian attack.
Meanwhile, in Russia, officials reported an overnight Ukrainian drone attack.
Four people were injured in the central Saratov area, where drones attacked residential buildings in the two cities. Local authorities said that one drone attacked an apartment building in the city of Saratov and another attacked a residential building in the city of Engels, where a military airport had been attacked earlier.
According to the Russian Defense Ministry, a total of 22 Ukrainian drones were intercepted overnight and in the early morning in eight provinces, including Saratov and Yaroslavl in central Russia.
The Russian military also blocked Ukraine's efforts to advance into a residential area in Kursk Oblast, where Ukraine launched an offensive on August 6.
The war in the region has raised concerns about the nuclear power plant here. International Atomic Energy Agency Director Rafael Grossi is expected to visit the plant on August 27.
