Belarusian strongman Alexander Lukashenko on Saturday ordered his defence minister to take "stringent measures" to defend the country's territorial integrity after mass protests erupted against his claim to election victory.

The 65-year-old authoritarian leader, who said he won a sixth presidential term with 80 percent of the vote in the August 9 ballot, made the comments while inspecting military units in Grodno, near Belarus's border with Poland, according to the president's press service.

Lukashenko denounced the recent mass protests, which he said were receiving support from Western countries, and ordered the army to defend western Belarus, which he described as "a pearl".

"It involves taking the most stringent measures to protect the territorial integrity of our country," Lukashenko said.

An admirer shows support for President Lukashenko, who vowed to "protect the territorial integrity of our country" ahead of a major rally which the opposition has called for Sunday
An admirer shows support for President Lukashenko, who vowed to "protect the territorial integrity of our country" ahead of a major rally which the opposition has called for Sunday AFP / Sergei GAPON

His visit comes ahead of large-scale military exercises planned in the Grodno region between August 28 and 31.

The former collective farm director said that NATO troops in Poland and Lithuania were "seriously stirring" near their borders with Belarus and ordered his troops into full combat readiness.

Lithuanian President Gitanas Nauseda denied the accusation Saturday.

"The regime is trying to divert attention from Belarus's internal problems at any cost with totally baseless statements about imaginary external threats," Nauseda told AFP.

Lithuania's foreign ministry also announced Saturday that US Deputy Secretary of State Stephen Biegun will visit Lithuania and Russia next week for talks on the elections fallout.

Opposition candidate Svetlana Tikhanovskaya, now in neighbouring Lithuania, says her compatriots will "never accept the current leadership again"
Opposition candidate Svetlana Tikhanovskaya, now in neighbouring Lithuania, says her compatriots will "never accept the current leadership again" AFP / PETRAS MALUKAS

Opponents of Europe's longest serving leader have organised strikes and the largest demonstrations in the ex-Soviet country's recent history to protest his re-election and demand that he stand down.

The opposition has called for a major rally in Minsk on Sunday after more than 100,000 people flooded onto the streets of the capital and other cities in Belarus last weekend demanding Lukashenko's resignation.

The European Union this week rejected his re-election and vowed to levy sanctions against what it said was a substantial number of people responsible for rigging the vote and cracking down on protests.

The Belarusian authorities have opened a criminal investigation into the opposition's Coordination Council, whose members are seeking new elections and a peaceful transition of power.

Lukashenko has rejected the idea of holding another ballot, dismissed calls to resign and accused the opposition of attempting to seize power.

On Friday he vowed to "solve the problem" of the protest movement.

Lukashenko's election challenger Svetlana Tikhanovskaya, who is now in exile in Lithuania, said this week that Belarusians would "never accept the current leadership again" after the crackdown on post-election protests.

Poland