Belarusian President Alexander Lukashenko (L) greets Russian President Vladimir Putin upon his arrival at the Minsk National Airport on December 19, 2022. AFP)
His arrival on an icy runway in Minsk came hours after Russian forces launched a swarm of attack drones at critical infrastructure in Kyiv, which provoked emergency blackouts in a dozen regions.
The Kremlin has for years sought to deepen integration with Belarus, which relies on Moscow for cheap oil and loans, but Lukashenko had resisted outright unification with Russia despite being a key ally in the war.
Speculation was mounting ahead of the Russian leader's visit that he would pressure Lukashenko to send his troops to Ukraine alongside Russia's military after a series of defeats for Moscow in nearly 10 months of fighting.
Kremlin spokesman Dmitry Peskov however described the reports "as totally stupid, groundless fabrications."
The drone attacks, which left three injured near Kyiv, came as Russia said it had shot down several US-made missiles over its airspace near Ukraine.
"I first heard the air raid siren howling from the street... I thought there is going to be a drone attack. For the first time, it scared me," Natalia Dobrovolska, a 68-year-old resident of Kyiv, told AFP.
She described hearing multiple explosions before power shut off in her building in western Kyiv. Officials said Russia had dispatched 35 attack drones nationwide, including 23 over Kyiv.
Ukraine said it had downed 30 of the aerial weapons, including Iranian-made "Shaheds", which have pummelled the capital in recent weeks.
Mayor Vitali Klitschko said critical infrastructure facilities were "damaged" while regional authorities said nine homes had been scarred by the attacks.
Energy operator Ukrenergo meanwhile announced that emergency electricity outages were scheduled in the capital and nearly a dozen regions.
At the same time, Moscow said its air defence systems had shot down four US-made missiles over Belgorod, a Russian region bordering Ukraine, in one of its first such claims in nearly 10 months of fighting.
Belarus Border A 'Priority'
"Four American 'HARM' anti-radar missiles were shot down in the airspace over the Belgorod region," the defence ministry said on social media.
Ukraine has experienced frequent and deadly aerial attacks in the 10 months since Russia invaded in late February.
After a series of battlefield setbacks and lost territory this summer and autumn, Moscow stepped up its aerial campaign to target the country's energy grid.
With winter setting in, missile and drone attacks have plunged cities around the country into darkness, and severed water and heat supplies to millions of Ukrainians.
After a major Russian assault aiming more than 70 missiles on cities last Friday, the national electricity operator was forced to impose emergency rolling blackouts as it raced to repair the battered energy grid.
Speaking to the leaders of several NATO countries via videolink after the drone attacks Monday, President Volodymyr Zelensky urged Ukraine's allies to supply its military with more weapons.
"Russian aggression can and must fail. And our task now is to accelerate it," he told the leader assembled in Riga.
He said in a late night address Sunday that some nine million people had their electricity restored after Russia's latest missile barrage last week.
Ukraine has an estimated population of 40 million.
Ahead of Putin's visit, Ukraine's leader also described the situation on Ukraine's border with Russia and Belarus as a "constant priority".
"We are preparing for all possible defence scenarios," Zelensky said, adding that he had recently discussed border regions with military commanders.
Lukashenko, who has been in power since 1994, is a long-time Kremlin ally and allowed Russian troops to attack Ukraine from his country on February 24.