Vouchak was able to inform his friends and colleagues via his cell phone on January 27 that police were taking him to a pretrial detention center and that his trial is scheduled for January 30.
Vouchak said he was arrested right after he visited a post office in Minsk from where he mailed a copy of the independent newspaper "Narodnaya volya" (People's Will) to Ivan Kruk, a colleague in the western city of Astravets.
No further details are available.
Vouchak is a former investigator at the Minsk Prosecutor-General's Office. Since 1990 he has been involved in human rights activities.