The workers chanted “leave” and booed the former leader of the former Soviet state, insisting that he would allow a new vote following accusations of voter fraud.
The strike action spread to state television, and departed Monday.
Opposition candidate Svetlana Tikhanovskaya warned that she could act as interim leader.
Police violence against opposition supporters, such as the alleged manipulation of the August 9 vote, prompted a large-scale protest rally on Sunday in the capital, Minsk.
Lukashenko has ruled Belarus since 1994, maintaining close relations with neighboring Russia, of which Belarus relies heavily on its energy supplies.
According to the independent online local news page Tut.by, Sunday’s opposition demonstration in Minsk “is the largest in the history of independent Belarus.”
A wave of anger has been on the rise since the Central Electoral Commission because Lukashenko had won 80.1% of the vote and Ms. Tikhanovskaya, 10.12%.
Hundreds of protesters were injured and two were killed in clashes with police last week, another 6,700 people were arrested and many spoke of torture at the hands of security forces.
During a visit to a tractor factory in Minsk on Monday, Lukashenko tried to protect his disputed victory and told the workers: “We celebrate the election. As long as they don’t kill me, there won’t be any other choices.”
However, he said he was in a position to hold a referendum and “renounce my authority according to the letter, but not under pressure and not through street protests.”
While Mr. Lukashenko spoke at the factory, the staff booed him and choreographed “leave.”
Also on Monday, the Minsk Philharmonic Orchestra organized an event to make a song.
Last week, in state factories that left in solidarity with the protesters, and more movements are planned this week, increasing pressure on Lukashenko.
At state TV, staff walked out in protest against censorship and the election results.
Ms. Tikhanovskaya, who left for Lithuania after denouncing the results, insists that where the votes were counted, she won aid ranging from 60% to 70%.
In a video message broadcast Monday, he said he was in a position to be a “national leader” to repair calm and normalcy, free political prisoners and prepare for new elections.
Russian TV news ads set disturbing parallels between Belarus 2020 and Ukraine in 2014. Ukraine’s pro-western revolution led Moscow to send its special operations forces to annex Crimea and russian army intervention in eastern Ukraine.
Six years later, can the Russian army interfere in Belarus? On paper, at least, such a technique would seem counterproductive. The opposition motion in Belarus is not anti-Russian/pro-Europe – it is anti-Lukashenko. If Russia sent troops to the Belarusian leader, it can alienate the other Belarusians and create anti-Moscow sentiment.
Certainly, Moscow is determined to keep Belarus in what it considers Russia’s sphere of influence. The Kremlin’s ultimate purpose is a deeper integration with its neighbor, a state of self-right unity (with Vladimir Putin at the helm). You may still do so through political influence.
The Kremlin has a pathological concern about the “color revolution” on its doorstep. But Minsk 2020 is not Kiev 2014. Belarus does not do so between East and West. The other Belarusians are outraged by the brutality of their security forces. So much so that even Lukashenko’s classic base, adding the staff of the state factory, abandoned it.
Rival rallies were held in the capital, and the opposition occasion seemed to attract a much larger number.
An official report said another 65,000 people attended the presidential rally, although unofficial estimates were as low as 10,000. Unofficial estimates of the opposition demonstration ranged from 100,000 to 220,000.
There are reports that the public sector was forced to attend Lukashenko’s demonstration or threatened to lose its jobs.
As the president spoke, anti-Lukashenko protesters piled up for a nonviolent demonstration near a memorial to the fallen in central Minsk.
They have resigned several public servants, both in functions and former police officers.
Belarus’s ambassador to Slovakia, Igor Leshchenya, declared solidarity with the protesters. He told the BBC: “I am Belarus and the Belarusian people, who according to our letter is the source of power.”
EU leaders will hold a video emergency summit on Wednesday. EU chancellors agreed last week to prepare new sanctions against Belarusian officials guilty of “violence, repression and falsification of election results.”
The UK said monday that it was not content with the effects of “fraudulent” elections.
“The world has watched with horror the violence used through the Belarusian authorities,” Chancellor Dominic Raab said.
Also monday, U.S. President Donald Trump said his administration was closely following the “terrible situation” in Belarus.
President Lukashenko asked Russia for help and said President Vladimir Putin had promised to provide comprehensive assistance in the event of a threat from the outside army.
In a verbal exchange on Sunday, the two men discussed “the one in Belarus, taking into account the tension exerted across the republic from the outside,” the Kremlin said.