Police hunting a rapist in Aberdeen are keeping an "open mind" on who the attacker is.
A 22-year-old woman was walking near shops on Bedford Avenue, in Powis, at about 07:30 on Saturday when she was attacked.
More than 100 police officers are involved in the investigation.
A "dangerous and predatory" criminal, Lee Cyrus, is missing from an open prison, but Grampian Police said their focus was not on anyone specific.
Cyrus is suspected of possibly carrying out a recent sexual attack in Tayside.
The 47-year-old, from Preston, who is also known as Ivan Leach, was serving life for robbery when he failed to return to a Lincolnshire open prison while on day release on 9 October.
Police believe Cyrus could be sleeping rough and travelling the country, most likely on public transport.
Grampian Police Det Ch Insp Martin Dunn said: "Our enquiries are at early stage and we're keeping an open mind.
"At this time the investigation's not focussed on any specific individual and the public should be assured that we will investigate every possible line of enquiry."
The Aberdeen suspect is white, about 30 years old, about 6ft tall, of medium build, with an unkempt appearance, as if he had been sleeping rough.
Det Ch Insp Dunn added: "This was a vicious sexual assault which has left a young woman injured and traumatised."