Three men were remanded into custody by Eastern Uusimaa District court on Wednesday on suspicion of a series of beatings that they are alleged to have conducted while working as security guards.
Three other security guards were detained by police last week in relation to alleged assaults, but not remanded by the court on Wednesday.
Their cases will be heard later. Police arrested the additional guards after examining devices owned by the original suspects.
The violence took place at or near train stations in Espoo, Helsinki and Vantaa. The earliest incident took place on 7 February this year, and the latest on 12 December.
Police say they have evidence the guards went well beyond their powers as security guards, and humiliated their victims. They suspect the guards moved the victims to secluded areas and then kicked them and attacked them with telescopic batons, while filming some of the incidents.
Police have been unable to reach all the victims, but one new victim has come forward after the case was publicised.
Sacked by Avarn
All six of the guards have now been fired by their employer, the Vantaa-based Avarn Security.
"We are sorry that our company has employed people who, according to the police investigation, there are grounds to suspect of committing serious crimes," read a statement from Avarn.
"We condemn all unprofessional behaviour, and we have a clear zero-tolerance policy for illegalities."
Yle reported in 2021 that Avarn employees were prosecuted over 21 offences in and around train stations between 2016 and 2020. Two Avarn employees were fined and ordered to pay damages over an assault at Helsinki Central Railway station on New Year's Eve 2016.
