Belarus strongman Alexander Lukashenko on Monday said forces had been put on high alert, adding that four aircraft had reportedly been shot out of the sky in southern Russia.
Lukashenko, 68, visited the ex-Soviet country's air force central command, reappearing in public after nearly a weeklong absence following reports alleging ill-health.
He wore a military uniform, looked grim and had a bandage on his hand.
Lukashenko said Belarus put forces on alert for three days following the incident in a southern Russian region on the border with Ukraine.
"Three days have passed after the events near us, I mean in the region of Bryansk where four aircraft were shot down," Lukashenko said without providing further details.
"We had to react," he said.
While the Russian defense ministry did not comment, Alexander Bogomaz, the governor of the Bryansk region, said a helicopter crashed in the town of Klintsy.
On Saturday, footage of several Russian aircraft crashing in the region of Bryansk circulated on Russian social media. One video showed a helicopter apparently being hit and catching fire.
In a conflicting statement, Vladimir Rogov, a Moscow-installed official in the Russian-controlled part of Zaporizhzhia in southern Ukraine, said that four Russian aircraft had been shot out of the sky: two MI-8 helicopters, an SU-35 fighter jet and an SU-34 fighter bomber.
Lukashenko, who has been in power since 1994, had last been seen Tuesday in Moscow for celebrations of the Soviet victory over the Nazis.
He skipped a lunch hosted by his ally Russian President Vladimir Putin as well as several other events last week.
Prepared for every scenario
Belarus opposition leader Svetlana Tikhanovskaya, who fled to neighboring Lithuania after 2020 mass protests of Lukashenko, took to Twitter to tell Belarusians they should be ready for any event.
"For us, it means only one thing: we should be well prepared for every scenario," she said. "To turn Belarus on the path to democracy and prevent Russia from interfering.”
"We need the international community to be proactive and fast,” Tikhanovskaya added.
Lukashenko's spokespeople did not comment on his absence from public life.
Last year, Lukashenko allowed Russia to use Belarusian territory as a launchpad for its offensive on Ukraine.
In 2020, the former collective farm boss claimed to have won a sixth term in an election that spurred hundreds of thousands of Belarusians to take to the streets in protest.
His regime crushed the unprecedented protest movement, jailing or pushing most dissenters into exile.
