MOSCOW, November 3. /TASS/. The Security Service of Ukraine (SBU) has opened three criminal cases against participants in Monday’s protest outside a secret detention facility near Kiev, Ukrinform reported, citing SBU Deputy Head Ivan Rudnitsky.

According to Rudnitsky, law enforcement authorities have identified approximately 100 protesters. Searches are underway, and the possibility of making arrests is being considered. The SBU said on its Telegram channel that the cases had been opened under articles of the Criminal Code concerning obstruction of the activities of the Ukrainian armed forces, the unauthorized disclosure of information about the deployment of defense forces, and mass unrest.

On Monday, Ukrainian media reported that armed individuals were holding approximately 40 people in the basement of a private house near Kiev. An ambulance was dispatched to the scene after a medical worker said she had received video footage showing several detainees in critical condition, many with injuries consistent with torture. However, armed guards prevented medical personnel from entering the building.

Outraged local residents gathered outside the property, where clashes broke out. When protesters attempted to force open the gate, they were met with tear gas. Only after the incident attracted widespread public attention were medics allowed to remove four people bearing signs of physical abuse, one of whom was in serious condition. According to media reports, a 14-year-old boy was among those being held, with eyewitnesses describing his condition as horrific.

Police later officially confirmed that the house was being used to accommodate personnel of the Ukrainian National Guard. National Guard Commander Alexander Pivnenko said the four injured men were soldiers who had gone absent without leave (AWOL). He described the property as a "temporary deployment point" and acknowledged that mobilized servicemen were also being held there. Following mass protests outside the building, the National Guard agreed to allow all those being held there to be taken to a medical facility for examination.

Earlier on Tuesday, Ukraine’s State Bureau of Investigation launched a separate inquiry under a provision of the Criminal Code concerning the abuse of power or official authority by a military official.