Police investigating the murder of two prostitutes found dead six days apart in the same stream say further tests are needed to determine how they died.
On Saturday detectives confirmed a body found near Copdock Mill, Ipswich, in Suffolk, was that of Tania Nicol, 19.
Det Supt Andy Henwood said there were "obvious similarities" with the death of another prostitute, Gemma Adams, 25.
Ms Adams was discovered two miles away near Hintlesham on 2 December but the cause of their deaths is still unclear.
The women, who were friends and lived in Ipswich, had been working as prostitutes in the city's red light district.
Det Supt Henwood said they were treating the deaths as "linked investigations".
"There are obvious similarities between Tania's and Gemma Adam's disappearances and subsequent deaths," he said.
"However we will be seeking further information from specialist advisers to confirm this view."
The body of Gemma Adams was found last week
Ms Adams disappeared after leaving home on 15 November to go to work. Her body was found on Friday.
Former sex worker Charlie Daniels, who campaigns on issues surrounding prostitution, said girls on the street needed more help.
She said: "I can't see how I live in a country where we have always looked after the most vulnerable types of people and yet prostitution has been looked down on as much as it is.
"Girls who work the streets are vulnerable, these are girls who are sometimes on drugs, or single parents, or whatever, and yet they are trodden down on and people disregard them as disposable members of society in some cases."
Det Supt Henwood said officers were still seeking to trace the clothing the two dead women were wearing on the nights they went missing.
Post-mortem examinations have been carried out on both bodies but police said more tests were now needed.
They said there was no evidence that either woman had been sexually assaulted and there were no obvious signs of injury to either body.