Russia has launched a multi-wave attack on Ukraine with 70 air-assault weapons including cruise and hypersonic missiles and Iranian-made drones, Kyiv's air force says.
The air force - which is celebrated in a holiday on Sunday - said on the Telegram messaging channelapp Ukraine's air defence destroyed 30 out of 40 cruise missiles and all 27 of the Shahed drones Russia launched overnight.
"In total, in several waves of attacks, from the evening of August 5 to the morning of August 6, 2023, the enemy used 70 means of air assault weapons," the air force said.
It also said Russia launched three Kinzhal hypersonic missiles, but would not elaborate.
Reuters could not independently verify the report.
There was no immediate comment from Russia.
It was not clear whether there was any damage from the overnight attack or what happened to the 10 cruise missiles that were not shot down.
Air force spokesman Yuriy Ihnat told the national Ukrainian broadcaster one of the key targets for Russia's overnight attack was the Khmelnytskiy region.
"Now, it is the Starokostiantyniv airfield that haunts the enemy," Ihnat said.
Russia had earlier targeted the Starokostiantyniv military airfield in the Khmelnytskiy region at the end of July.
It comes as officials said Russia's air defence system destroyed two aircraft-type drones over the Karachevskyi district in the Bryansk region on Sunday.
"There were no damages or casualties," Alexander Bogomaz, governor of the Russian region that borders Ukraine said on the Telegram channel.
It was not clear who launched the drones, and there was no immediate comment from Ukraine.
Kyiv almost never publicly claims responsibility for attacks inside Russia or on Russia-controlled territory in Ukraine.
Russian authorities say the Bryansk region - which borders both Ukraine and Belarus - has seen multiple attacks by Ukrainian forces and pro-Ukrainian sabotage groups in the 17 months since Russia launched its invasion of Ukraine.
Ukrainian President Volodymyr Zelenskiy said on Saturday three people were killed after a Russian-guided aerial bomb hit a blood transfusion centre in the town of Kupiansk, in eastern Kharkiv.
"There are dead and wounded," he said on his Telegram channel.
Reuters could not immediately verify the report.
Kupiansk is a railway hub fewer than 16 kilometres from the front.
"This war crime alone says everything about Russian aggression," Zelenskiy said.
"Beating the terrorists is a matter of honour for all who value life."
The latest attacks come after both sides said on Saturday a Ukrainian sea drone full of explosives had struck a Russian fuel tanker near a bridge linking Russia to annexed Crimea, the second such attack in 24 hours.
Russian Foreign Ministry spokeswoman Maria Zakharova said on Saturday Russia would retaliate.
"The Kyiv regime, meeting no condemnation from Western countries and international organisations, is actively applying new terrorist methods, this time in the waters of the Black Sea," Zakharova said in a statement.
