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.
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The victim, a Leeds woman aged in her fifties, was walking her animal along Bootham in York on Friday evening at around 8pm.
Durham Crown Court heard how Sarah Louise Fettis approached the woman after spotting her in a pub and began shouting and swearing at her.
A judge said adoption would give the baby the "best prospect" of growing up in a "safe and secure" way.