As a result of operational-search activities carried out by the Angarsk police, 13 suspects in the attack on the environmentalists' camp in the early morning of July 21 were identified. By 13:00 Moscow time, 4 detainees were reported. On July 23, 2007, 12 detainees became known. On July 23, 2007, it became known that 20 people had been detained . The regional prosecutor's office reports 14 detainees.

On July 21, 2007, in Angarsk (Irkutsk region), a group of skinheads armed with baseball bats, knives and pneumatic weapons attacked a camp of environmentalists (activists of the organizations "Autonomous Action", "Rainbow Guardians" and independent ecologists) protesting against the processing of nuclear waste at Angarsk electrolysis chemical plant. The attack took place early in the morning, around 5 a.m., and the sleeping people were unable to offer resistance.