Eight arrests were made by police as part of an ongoing investigation into South Yorkshire's child sexual exploitation.
Officers from the South Yorkshire Police incident room at Rotherham are leading Operation Morph Charlie.
This is after West Yorkshire Police refers to it over disclosures they have received.
These offences were allegedly committed in the 1990s at various locations throughout Sheffield and Rotherham.
According to the Local Democracy Reporting Service, Dr Alan Billings, South Yorkshire's crime commissioner, reported that the investigation had "expanded significantly" over time with 16 suspects being identified.
It stated that the investigation had moved to an arrest phase, and that eight of the suspects were now detained.
The report stated that "The investigation is expected to last for a number months."
It has been described by many as complex and historic. The incident room is currently manned full-time by eight staff.
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