Seven people, three of them children, have been killed in Ukraine’s western city of Lviv, according to the mayor, during a fresh wave of Russian attacks, writes BBC.

The strike came as Ukraine was still reeling from the deaths of at least 50 people at a military institute in the central city of Poltava on Tuesday.

Lviv Mayor Andriy Sadovy said Russia had attacked with drones and hypersonic missiles early on Wednesday. Among those killed were a baby and two girls aged nine and 14 as well as a woman working as a midwife in the city, officials said.

Explosions were also heard over the capital Kyiv as air defences targeted Russian missiles.

Meanwhile, five people were wounded when a hotel was hit and nearby blocks of damaged in the city of Kryvyy Rih, according to officials. “Thank God everyone is alive now”, said mayor Oleksandr Vilkul.

The Ukrainian military said the whole country has been placed under an air alert.

Dozens of people were also wounded in Lviv and Mr Sadovy said more than 50 buildings in the heart of the city had been damaged, including homes, schools and clinics. Rescue workers are continuing to search through the rubble of a military institute in Poltava for survivors of Tuesday’s attack.