Russia launched a record 90 Shahed-type drones on Ukraine during the early hours of the new year, the Ukrainian air force said on Monday, while Russia also reported attacks.

A 15-year-old boy was killed and seven people wounded after falling debris from one of 87 downed drones hit a residential building in the city of Odesa, the head of the region’s military administration, Oleh Kiper, said. Debris also caused a number of small fires, including at the city’s port.

In the western city of Lviv, Russian attacks struck a museum dedicated to Roman Shukhevych, a Ukrainian nationalist and military commander who fought for independence during the Second World War. University buildings in the town of Dubliany were also damaged, although no casualties were reported.

Andriy Sadovyi, the Lviv mayor, described the strike as “symbolic and cynical” in a post on social media, adding: “This is a war for our history.”

Meanwhile, four were killed and 13 more wounded following Ukrainian shelling on Russian-occupied areas of Donetsk, according to Denis Pushilin, the area’s Moscow-installed leader. State media reported that a journalist was among the victims, but provided no further details.

One person was also killed and another wounded in shelling on the Russian border town of Shebekino, Vyacheslav Gladkov, the regional governor, said.

The aerial strikes follow bombardments that began on Friday, when Russia unleashed an 18-hour attack that one air force official described as the biggest aerial barrage of the war.

At least 49 people were killed in the raids, with rescuers in Kyiv reporting on Monday that they had recovered at least eight more bodies from underneath the rubble.

Shelling blamed on Ukraine in the centre of the Russian border city of Belgorod on Saturday killed 21 people, including three children, local officials reported.