Authorities throughout the country have made a total of more than 6000 detentions over the course of the protests, which erupted on Sunday as polls closed.

Calling for long-time President Alexander Lukashenko to resign, chanting "Get out!," protesters have taken to streets in major cities. They accuse Lukashenko of rigging the vote to win a sixth consecutive term.

Lukashenko, 65, has led Belarus, a former Soviet republic in Eastern Europe, between Russia and EU member state Poland, for a quarter century, tolerating little dissent.

Electoral authorities said Lukashenko won 80 per cent of the vote in the weekend poll. Police have conducted a violent crackdown on the demonstrations, with officers filmed beating protesters with truncheons.

The European Union has condemned the election as "neither free nor fair" and said "state authorities deployed disproportionate and unacceptable violence causing at least one death and many injuries."

"The people of Belarus deserve better," the EU said in a statement.

Several protest organisers have been detained, state news agency BelTA reported on Wednesday.

The official runner-up in the election, Svetlana Tikhanovskaya, 37, travelled to safety in neighbouring Lithuania to be with her children who had already been sent there.

Her husband and another top potential challenger to Lukashenko were jailed in the run-up to the vote.

Australian Associated Press