Detained protesters in Belarus have been systematically tortured, human rights group Amnesty International said in a report released on Wednesday.

Belarusians have been taking to the streets against President Alexander Lukashenko, once dubbed Europe's last dictator, since his disputed re-election in August.

More than 30,000 protesters have been arrested, many killed and hundreds injured in the demonstrations.

What does the report say?

The Amnesty report cites testimonies from detainees who say they were stripped naked, beaten and deprived of food, drinking water or medical care for days.

Amnesty says it has photos, video recordings and testimony of detainees, victims and witnesses that can be used as evidence of rights violations.

But Marie Struthers, the group's director for eastern Europe and central Asia, said the country's justice system "not only protects police with anonymity, but also encourages intimidation and further violence against victims and witnesses."

She said an international investigation was needed into "the unprecedented scale of the ongoing human rights violations" and the perpetrators must be prosecuted. 

Pressure from the UN

Last month, UN human rights chief Michelle Bachelet urged the government to release all people unlawfully arrested in post-election protests and investigate some 2,000 complaints of torture or ill-treatment in custody.

The Belarusian government has repeatedly all of the allegations.

Lukashenko, who has ruled Belarus for 26 years, claimed victory in the elections with 80.1% of the vote.

Opposition leader Sviatlana Tsikhanouskaya and the international community, including the EU and the US, contest the results.

jf/rt (dpa, Reuters)