A man has been charged with deliberately infecting other men with HIV.
Daryll Rowe, 26, of no fixed address, was arrested in Brighton following the allegations earlier this year, but failed to answer bail.
As a result he was arrested in Wallsend, North Tyneside, after a joint operation by Northumbria Police, Police Scotland and Sussex Police.
He has now been charged with eight counts of causing grievous bodily harm and one count of attempting to cause grievous bodily harm.
Northumbria Police said: "Anyone who thinks they may have had a sexual encounter with this man is urged to come forward and anyone with concerns is encouraged to contact their local sexual health services."
Rowe has been remanded in custody and is due to appear at Newcastle Crown Court this week.