Four men have been arrested in east London on suspicion of child sexual exploitation.
Two of the men who've been arrested are 25 - the other two are 23. All of them are being held in custody at an east London police station.
The victims were aged between 16 and 18 at the time of the offences.
Police say the offences the men are suspected of committing are trafficking within the UK for sexual exploitation, rape and controlling a child prostitute.