The News of the World today offered a reward of £250,000 to catch the killer of the Ipswich prostitutes.
It is for information directly resulting in the arrest and conviction of the person, or persons, responsible for the murders.
The reward is thought to be the largest ever offered and a spokeswoman for the newspaper said: "We hope this historic reward will help in solving the series of brutal murders which has shocked the nation.
"If you have any information about these crimes, we urge you to contact the authorities, or the News of the World if you prefer."
Detective Chief Superintendent Stewart Gull, leading the inquiry, said: "I am grateful for the support from the News of the World. Clearly any offer that leads to the identification of whoever is responsible for these crimes is welcome."
The offer is subject to standard News of the World reward offer conditions. Payment will be made at the discretion of the editor, following consultation with the Chief Constable of Suffolk Police. The editor's decision is final.
In the event of more than one person qualifying, the reward may be split.
Anyone with information should contact: Police hotline 0800 096 1011, or the News of the World - newsdesk 0845 35 63300, text 63300 - or Crimestoppers 0800 555 111.Reuse content