Residents are called upon to help fight any aggressions, whether it's from Moscow or Minsk.
"We are convinced that only together can we resist global challenges," Belarusian President Alexander Lukashenko said.
His remarks come days after Ukrainian President Volodymyr Zelensky warned Belarusians not to allow Putin to drag their country into his war against Ukraine.
The three unnamed men have been accussed of terrorism, a charge that attracts the death penalty in Belarus as of May 2022.
A Kremlin spokesperson claimed that the conflict will end when Kyiv orders Ukrainian nationalists to surrender their weaponry.
The region is sandwiched between NATO member countries Lithuania and Poland and has been Russian territory since 1945.
"You are not slaves and cannon fodder. You don't have to die," the Ukrainian leader said on Sunday night.
Video footage showed a motorcade rushing towards the Kremlin building, the seat of the Russian government.
This includes Vladimir Putin promising to send nuclear missiles to Belarus.
Belarusian President Alexander Lukashenko on Saturday voiced his concerns to the Russian president about the "aggressive" actions of Poland and Lithuania.
Putin wants to drag Belarus into the Ukraine war "as a direct participant," officials in Kyiv said Saturday after the attacks.
Russia has a manpower shortage, "so any additional troops would add greatly to their potential," said Mark Voyger, noting the potential use of Belarusians.
After Russia's invasion of Ukraine in February, players from both nations were banned from international tennis competitions altogether.
Exiled democratic leader Sviatlana Tsikhanouskaya told Newsweek how the dictator is trapped by his support for Russia's bungled invasion of Ukraine.
Belarusian President Alexander Lukashenko has publicly championed the role of import substitution in lessening reliance on Western products.
The new sanctions aim to "further tighten and enforce existing sanctions" by pinpointing yachts in which "sanctioned Russian elites maintain interests."
Belarusian President Alexander Lukashenko on Monday said providing Ukraine with such weapons could result in World War III.
Belarusian President Alexander Lukashenko's warning came as Russia sold missiles with nuclear capabilities to his country.
The Collective Security Treaty Organization (CSTO) met in Moscow on Monday but only Belarus's leader showed support for the Ukraine war.
"Lukashenko talks like the village idiot, but after everything that's happened, it's always possible that he's really voicing Putin's private thoughts."
"I feel like this operation has dragged on," Belarusian President Alexander Lukashenko said during an interview in Minsk on Thursday.
Belarus has consistently denied that it plans to join Russia's offensive in Ukraine, although Kyiv has claimed that Ukraine was attacked from Belarusian territory.
The Belarusian defense ministry said its sudden large-scale military drills are to "assess the readiness and ability of personnel to respond promptly to possible crisis situations."
Leaders of four former Soviet Union republics have firmly condemned Russia's invasion of Ukraine.
The two countries want to expand their Union State to involve other countries, Belarusian media reported.
Russia had developed a detailed plan to invade another neighbor, according to the Ukrainian defense ministry.
"I stole some cosmetics for you," a Russian soldier tells a relative in a phone intercept. "That will make for a nice 'hello from Ukraine,'" she replies.
Ukrainian officials are in talks with the Polish government to "completely close" the country's border with Belarus, Ukraine's ambassador to Poland said.
"FINA maintains its strongest condemnation of the Russian invasion of Ukraine," the sporting organization stated.