Ukraine’s military said on Tuesday that Russia launched 188 attack drones against the country overnight, calling it a record number as both sides intensify aerial assaults.

The Ukrainian Air Force said that it had shot down 76 of the drones in the “massive attack” but that nearly all the rest had disappeared from radar. It was unclear how many of those drones had been intercepted by other means, such as electronic interference, and how many had struck targets.

Some critical infrastructure was hit and residential buildings were damaged in several regions, according to the Ukrainian Air Force. Damage to the power grid in Ternopil, a city in western Ukraine, caused electricity and water outages, the local authorities said.

Russia’s military has attacked Ukrainian cities with waves of drones almost every night since September in a campaign that analysts say is intended to test and wear down air defences. The drones have also targeted Ukraine’s energy infrastructure in a renewed effort to plunge the population into cold and darkness as winter sets in.