The other suspects were arrested in France.
They are accused of forcing young Bosnian women and children to pickpocket on their behalf in France.
The victims were mistreated physically and psychologically by the alleged traffickers, according to police.
Authorities say the gang is also suspected of money laundering, forging documents and drug offences.
Police estimate the suspects made over €2m (£1.4m; $2.2m), which they spent on property and luxury cars