KYIV: Russia launched its largest aerial attack against Ukraine overnight, as part of an escalating bombing campaign that has further dashed hopes for a breakthrough in efforts to end the 3-year-old war.

According to Ukraine's air force, Russia fired a total of 537 aerial weapons at Ukraine, including 477 drones and decoys and 60 missiles.

Of these, 249 were shot down and 226 were lost, likely having been electronically jammed.

Yuriy Ihnat, head of communications for Ukraine’s air force, described the overnight onslaught as "the most massive air strike" on the country to date, taking into account both drones and various types of missiles.

The attack targeted regions across Ukraine, including western Ukraine, far from the frontline.

Poland and allied countries scrambled aircraft to ensure the safety of Polish airspace, according to the Polish air force statement released Sunday.

Kherson regional Governor Oleksandr Prokudin reported one fatality in a drone strike.

Six people were wounded in Cherkasy, including a child, as per regional Governor Ihor Taburets.

The ongoing war shows no signs of abating, with US-led international peace efforts having produced no breakthroughs so far.

Two recent rounds of talks between Russian and Ukrainian delegations in Istanbul were brief and failed to yield any progress toward a settlement.