Two arrests have been made by police investigating a number of sex attacks around a university campus.
Earlier today, a senior detective said the wanted offender - who was described as young as 12 - needed to be caught before the assaults in Manchester escalated.
Following the appeal a 14-year-old boy and an 18-year-old man have been arrested on suspicion of sexual assault and are being questioned in custody.
Three separate attacks have taken place surrounding the grounds of the University of Manchester in the past month.
The first two assaults took place within 15 minutes of each other on Saturday September 21.
A 27-year-old woman was approached from behind and grabbed in Lloyd Street North at 6.15pm before she screamed and the offender ran off.
The next incident followed in Oxford Road when a 21-year-old woman was approached by a boy who made lewd comments as she left John Rylands library.
She carried on walking on Moss Lane East and was sexually assaulted by her assailant who was described as a young Asian boy aged 12 who wore green jeans and glasses.
The third attack took place at the Manchester Science Park in Lloyd Street North at about 2.15pm on Saturday October 5.
A 32-year-old woman was approached by two young boys and sexually assaulted by one of them described as being Asian, 12 to 13 years old, of slim build, with a small frame who wore baggy trousers and carried a rucksack on his back.
She pushed the boy away but he approached her again and sexually assaulted her for a second time before running off towards Pencroft Way in company with the second child, also described as a young Asian boy.
Following tonight's arrests, Detective Chief Inspector Colin Larkin said: "These crimes have shocked everyone and I am pleased to say that we have now made two arrests.
"I would like to thank members of the public and the media for their support and the information they have provided and as a result we are now in a position where two people are in custody and are being questioned.
"However, we still remain in the early days of this investigation and there is still a lot of work to be done. I want to reassure the community that, whilst we have made arrests, we will continue to investigate these appalling incidents so we so can establish all the facts and who is responsible.
"I would continue to appeal to anyone who either has information about these three attacks or has information about any other incidents of this nature to come forward."
Anyone with information should phone police on 0161 856 4223 or the independent charity Crimestoppers, anonymously, on 0800 555 111.