A further four men have been arrested on suspicion of conspiracy to rape after three more houses were searched in Newcastle and South Tyneside today.
This brings the total number of people arrested as part of Operation Sanctuary to 25.
Those arrested yesterday have been bailed.
Police are continuing to urge anyone who knows a victim - or who believes they have been a victim themselves - to come forward.
People can contact police on 101 or speak to their local neighbourhood officers who are out and about patrolling in the area or call the independent charity Crimestoppers on 0800 555 111.
More top news
New law will protect the dignity of both men and women, the Government says.
Transport Secretary Chris Grayling has survived a vote of no confidence, amid claims his credibility will "never recover" .
Mark Smith has confessed to killing 38-year-old Jillian Grant, whose body was discovered in North Shields on December 25 last year.