Ukraine claims that for the first time one of its sea drones has downed a Russian military target in the air during a day of intense attacks by both sides as the war edges closer to its three-year anniversary.
Ukraine's military intelligence agency (GUR) said in a post on Telegram on December 31 that a Magura V5 sea drone equipped with missiles shot down an Mi-8 helicopter in a battle near Cape Tarkhankut on Crimea's west coast.
Another Russian helicopter, the GUR said, was hit by fire but managed to return to a Russian airfield.
"GUR soldiers destroyed an air target for the first time in the world using a Magura V5 naval drone," the intelligence agency said in the post, which had grainy video of what it said was evidence of the attack.
The video has not been independently verified.
The GUR claim came hours after air-raid sirens blared across Ukraine as Russia launched another countrywide massive air attack, with explosions heard in some parts of Kyiv.
Warnings were issued in the Chernihiv, Sumy, Poltava, Luhansk, Dnipropetrovsk, Zaporizhzhya, Kyiv, Cherkasy, Kirovohrad, and Vinnytsya regions and local media said cruise and ballistic missiles launched in the attack.
The Kyiv military administration reported that three private buildings and two cars in the Darnitsky district were damaged by falling debris as air-defense systems repelled the Russian missile strikes. There were no casualties, according to the head of the administration, Serhiy Popko.
The head of the municipal administration in Shostka in the Sumy region, Mykola Noga, said 12 multistory residential buildings and two educational institutions were damaged, while several individual infrastructure facilities were destroyed.
No information on possible casualties was given.
A woman told RFE/RL at the scene that she and her husband ran into a hallway of their third-floor apartment after hearing explosions. She said they taped up a broken window before more explosions and damage occurred.
"We put a blanket [on the window], but it did not help," she said.
She described her home as "half intact" and said the wind is blowing through it. She and her husband planned to spend the night at their daughter's home.
Ukrainian President Volodymyr Zelenskiy told the nation later in an address to mark the new year that Ukraine must fight in 2025 to bolster its position both militarily and ahead of any talks to end Russia's three year invasion.
"Every day in the coming year, I, and all of us, must fight for a Ukraine that is strong enough. Because only such a Ukraine is respected and heard both on the battlefield and at the negotiating table," he said in his address.
"May 2025 be our year," he added. "We know that peace will not be given to us as a gift, but we will do everything to stop Russia and end the war. This is what each of us wishes for."
Earlier on December 31, Ukrainian drones attacked an oil depot in Russia's Yartsevo district of the Smolensk region.
Smolensk regional Governor Vasily Anokhin said the fire was caused by falling debris when the drones were shot down.
"As a result, a fuel spill occurred and flammable materials began to ignite. There is no threat to residential buildings," he wrote on social media.
The new attacks come a day after the United States pledged additional security assistance for Ukraine to help strengthen its defenses along the front line.
The White House said in a statement on December 30 that the pledge includes an additional $1.25 billion drawdown package for the Ukrainian military and a $1.22 billion Ukraine Security Assistance Initiative package.
Hours later, the Treasury Department announced a separate $3.4 billion disbursement to Ukraine in direct budget support.
The announcements came as the White House ramps up support to the war-torn country before President Joe Biden's term ends next month.
Biden pledged to continue ratcheting up support, but the package is likely to be the last brought forth during his administration amid concerns that President-elect Donald Trump will significantly reduce or halt arms supplies to Ukraine in order to push Kyiv to negotiate a peace settlement with Russia.
Trump is scheduled to be inaugurated on January 20.
Russia has been pushing back Ukrainian troops on the front lines for weeks and claimed on December 29 to have seized another town in Ukraine's Donetsk region as it continues its long, bloody drive against the strategic -- but nearly destroyed -- southern logistics hub of Pokrovsk.
Russia's Defense Ministry said on December 30 that its forces captured Novotroyitske, a settlement with a prewar population 6,300 about 16 kilometers south of Pokrovsk.
The Ukrainian military did not comment specifically about Novotroyitske, but it said Russian troops had carried out 133 attacks on its positions, most of which were in the Pokrovsk area.
Analysts have speculated on what the Kremlin forces' next steps will be for the city, a strategic logistics hub for Kyiv.
The U.S.-based Institute for the Study of War (ISW) said geolocation data suggested the Russian military was about 10 kilometers from the border of the Donetsk and Dnipropetrovsk regions.
"[Russian President Vladimir] Putin may be putting pressure on the Russian military command to advance to the border, and not to cover Pokrovsk at this time," it wrote.
In an interview with RFE/RL, Viktor Muzhenko, the former Ukrainian military commander, said any truce between Kyiv and Moscow that leaves swaths of Ukrainian territory under Russian control would represent a victory for the Kremlin and "fully compensate [it] for its costs of the war."
Muzhenko, who led the military from 2014-19, said the situation with the occupied territories of Donetsk and Luhansk regions and parts of Zaporizhzhya and Kherson regions is "critical" -- "not only for the loss of territories, but also [the loss of] half of the resource base of Ukraine."
The General Staff of the Armed Forces of Ukraine said late on December 30 that during the day, some 153 combat clashes occurred on the front lines as Russia presses forward.
The ISW estimates territorial gains by the Russian army in 2024 reached about 3,300 square kilometers.
Counterattacks by Ukraine also took place in 2024, though only a few square kilometers of Ukrainian territory was recaptured.
The bulk of the Russian advances, it said, took place at the end of the year, when Russian troops captured 20 to 30 square kilometers per day, the ISW said.