Russian air defence forces have shot down three drones attempting to attack Moscow, according to the capital's Mayor Sergei Sobyanin.
He did not provide further details but said that emergency services were working at the sites where debris had fallen.
Russia's aviation watchdog said that Domodedovo and Zhukovsky airports in the Moscow region had temporarily suspended operations to ensure flight safety.
It announced soon afterwards that services had resumed.
Elsewhere, overnight strikes by Ukraine injured three people in the western Tula region, Russian officials said.
Earlier, Ukrainian officials said that Russia had carried out a barrage of drone strikes across the country, killing at least four people in the capital Kyiv.
"Kyiv came under another attack involving UAVs and ballistic missiles" overnight, the State Emergency Service of Ukraine wrote on Telegram.
Kyiv's Mayor Vitali Klitschko said that four people had been confirmed dead and 20 were wounded - 16 of whom were hospitalised.
Several fires broke out in various districts as a result of the shelling, including at a residential building, a civil infrastructure facility and a metal hangar while train tracks were damaged in the Kyiv area.
Strikes also hit the western city of Lutsk and Ternopil region.
"Today, the enemy carried out the most massive air attack on our region to date. There are multiple strikes," head of Ternopil's regional military administration Vyacheslav Negoda said.
"We have begun extinguishing fires and assessing the damage and other consequences," he added.
The shelling in Lutsk wounded five people.
"We also have numerous broken windows in private homes, several educational institutions, and one damaged government facility," the city's Mayor, Igor Polishchuk, said on Telegram.
Meanwhiile, buildings and cars were damaged in the western city of Khmelnytsky, according to the region's governor.
Russian President Vladimir Putin vowed to take revenge following a recent drone attack by Ukraine on Russian soil, which destroyed billions of euro worth of nuclear-capable bombers.
He appeared to rule out a ceasefire or any direct talks with Ukrainian President Volodymyr Zelensky.
Mr Zelensky said that Russia had issued an "ultimatum", demanding that his country fully pull out of four regions that Moscow claims to have annexed but does not fully control.
