A protest leader in Belarus - and key opponent of President Alexander Lukashenko - Maria Kolesnikova was detained by unidentified people in central Minsk on Monday (September 7).
That's according to local reports.
A witness told Belarusian media that Kolesnikova was pushed into a dark-colored van by masked men in plain clothes and driven away.
Kolesnikova is the last of three female politicians left inside Belarus who joined forces before last month's presidential election to challenge Lukashenko.
She has since played an important role in weeks of mass demonstrations.
Her alleged detainment comes after authorities in Belarus launched a tough crackdown on protests over the weekend.
Over 600 people were detained after tens of thousands took to the streets calling for Lukashenko to step down.
They were met by security forces who laid barbed wire on the streets, while military vehicles, water cannons and plain clothes officers in masks were deployed to try and contain the demonstrations.
On Sunday (September 6) local news posted several brutal videos showing police detaining protesters and men in plain clothes beating protesters and even breaking glass of a cafe where protesters were sheltering and dragging people out.
Protests have carried on for four weeks, since Lukashenko's re-election, which his opponents say was rigged.
Lukashenko who has been in power since 1994, still denies electoral fraud, and buoyed by a show of support from traditional ally Russia, he has rejected calls for new elections.