Detectives investigating the murders of five women in Ipswich in England are analysing a surge of new information.
They are trying to establish the movements of two of the women before they vanished.
Police have received a stream of calls from the public after the release yesterday of CCTV footage showing the last sightings of Anneli Alderton.
Today, officers have been speaking to rail travellers and have also stopped hundreds of motorists where Paula Clennell was last seen in the red light area of Ipswich.
Detective Chief Superintendent Stewart Gull said the response from the public to appeals for information had been phenomenal.
Interpol called in as investigation broadens
Suffolk police have enlisted Interpol in the search for the suspected serial killer.
The international crime fighting body was called in amid suspicions that the killer may have fled abroad, the Observer reported.
One theory is that the killer travelled through the nearby port of Felixstowe or is an itinerant who has now returned to mainland Europe, the paper said.
Meanwhile, the International Union of Sex Workers has called for the decriminalisation of prostitution to increase women's safety.
Marking today as the fourth annual International Day to End Violence against Sex Workers, president Ana Lopes said the Ipswich murders had highlighted the dangers of the trade.
