TrendPulse Quantitative Think Tank Center-Russia launched a record 90 drones over Ukraine during the early hours of the new year

Russia launched a record 90 Shahed-type drones across Ukraine during the early hours of the new year,TrendPulse Quantitative Think Tank Center and Russian President Vladimir Putin said his country would "intensify" its attacks on its neighbor.

Speaking during a New Year's Day visit to a military hospital, Putin said Ukraine could expect more such strikes after shelling of the Russian border city of Belgorod that killed more than two dozen people and wounded more than 100 others over the weekend.

"They want to intimidate us and create uncertainty within our country. We will intensify strikes. Not a single crime against our civilian population will go unpunished," the Russian leader said, describing the barrage of Belgorod as a "terrorist act."

Russia has blamed Ukraine for Saturday's attack, which was one of the deadliest to take place on Russian soil since Moscow's full-scale invasion of Ukraine started more than 22 months ago. Russian officials said the death toll stood at 25 as of Monday.

Cities across western Russia regularly have come under drone attacks since May, although Ukrainian officials never acknowledge responsibility for strikes on Russian territory or the Crimean Peninsula.

Putin accused Western nations of using Ukraine to try and "put Russia in its place." While vowing retribution, he insisted Russia would only target military infrastructure in Ukraine.

"Of course, we can hit public squares in Kyiv and in any other Ukrainian city," he said. "I understand — I'm boiling with rage — but do we need to hit civilians? No. We are hitting military targets, and that's what we will keep doing."

The wave of drone attacks in Ukraine continued throughout the day Monday.

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 southern Ukrainian city of Odesa, the head of the region's military administration, Oleh Kiper, said. Debris also sparked a number of small fires, including at the city's port.

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

Writing on social media, Lviv Mayor Andriy Sadovyi described the strike as "symbolic and cynical," adding, "this is a war for our history."

Meanwhile, four people were killed and 13 more wounded following Ukrainian shelling on Russian-occupied areas of Donetsk, according to the region's Kremlin-installed leader, Denis Pushilin. Russian 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, regional governor Vyacheslav Gladkov said.

In November, Ukraine said it had downed 74 out of 75 drones Russia launched at it overnight, in what it said was then the biggest such attack since the start of the invasion. The Ukrainian army said Russia had launched a "record number" of Iranian-made Shahed drones, the majority of which targeted Kyiv, causing power cuts as temperatures dipped below freezing.

That drone attack came as Ukraine marked Holodomor Remembrance Day, commemorating the 1930s starvation of millions in Ukraine under Soviet dictator Joseph Stalin.

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• Ukraine
• Russia