(ATTN: UPDATES with more details in last two paras)
SEOUL, April 6 (Yonhap) -- About 10 paid members of an illegal chat room on the Telegram messenger service that distributed photos and videos of a sexual nature have been booked for possessing child sexual exploitation materials, police said Monday.
They are also accused of paying cryptocurrencies to the pay-to-view online chat room, dubbed "Baksabang," to view illegal photos and videos of violent sex acts involving underage girls.
Police have apprehended Baksabang founder Cho Ju-bin, a 25-year-old, and his three accomplices for allegedly blackmailing women into sharing their sexual videos in the Telegram chat room and are now expanding their investigations into its paid members, estimated to reach around 15,000.
At least 103 people, including 26 teen girls, are believed to have been exploited in the case, in which their photos and videos of a sexual nature were distributed to the chat room's paid members.
Cho and two of the accomplices are now facing criminal indictments, while the third co-conspirator, identified as an Army soldier, was placed under arrest Monday after a military court issued a pretrial detention warrant for him.
The Army soldier with a rank of private first class has been under police custody since Friday for allegedly distributing content of women performing gruesome sex acts under coercion in collaboration with Cho.
Police have so far obtained the nicknames of the about 15,000 paid members of Baksabang from digital data secured from Cho and are now tracking down their personal identity information.
In a related move, the Seoul Metropolitan Police Agency raided about 20 cryptocurrency exchanges and purchasing agencies Monday to ascertain financial transactions between Cho and his paid members. Five of the exchanges and agencies were already raided by police late last month.
Through the multiple raids, police are also trying to figure out the amount of Cho's criminal proceeds.
Police said they have first booked about 10 out of Baksabang's paid members due to their possession of child sexual exploitation materials, adding most of them are in their 30s.
Meanwhile, Cho reportedly tested for drugs during the police investigation, but was confirmed to have had a negative reaction.
The police recently asked the National Forensic Service to analyze Cho's hair samples for traces of drugs after learning that he had defrauded many Telegram users in the past by pretending to sell drugs and guns online.
Legislation on compensating virus-hit small biz picks up steam
Anger mounts over deepfake porn targeting Korean female celebs; more than 330,000 sign petition
Biden's pick for Asia policy likely to seek stronger regional alliances to check China
Iran's oil tanker seizure appears aimed at pressuring S. Korea to unlock frozen assets: experts
S. Koreans feel pinch of rising housing costs amid economic downturn