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LONDON, England (CNN) -- Here is a timeline from Suffolk police of their investigation into the killings of five women -- all believed to be prostitutes -- whose bodies were dumped near the eastern England city of Ipswich:
Monday, October 30: Tania Nicol, 19, is last seen when she leaves home to work as a prostitute in Ipswich.
Wednesday, November 1: Nicol is reported missing by her mother.
Wednesday, November 15: Gemma Adams, 25, is reported missing. She is known to have worked as a prostitute in Ipswich.
Saturday, December 2: Adams' body is discovered in a brook at Thorpes Hill, Hintlesham (Suffolk County).
Sunday, December 3: Anneli Alderton, 24, is reported missing by her mother who tells police she may have taken the 5:53 p.m. train from Harwich to Colchester.
Friday, December 8: Nicol's body found in stream near Copdock Mill (Suffolk County).
Sunday, December 10: Alderton's body is discovered in an area of Woodland near Nacton (Suffolk County) when a passing motorist notices it near the roadside. Like Nicol and Adams, she worked as a prostitute in Ipswich.
Monday, December 11: Police appeal for two missing women -- Paula Clennell, 24, and Annette Nicholls, 29 -- to contact them. Clennell, who is also believed to work as a prostitute in Ipswich, has not been seen since Saturday night (Dec. 9). Nicholls was last seen by a relative either Dec. 3 or 4.
Tuesday, December 12: Police find two bodies near Ipswich. Police said they feared latest victims may be Clennell and Nicholls.
Wednesday, December 13: Home Office pathologist Nat Cary determines Alderton died from "asphyxiation," Gull announces at the daily news conference.
Thursday, December 14: Suffolk police identify one of the two bodies found Tuesday as Clennell, who died from "compression to the neck," according to Cary.
Friday, December 15: Fifth victim identified as prostitute Annette Nicholls as police finally linked all five cases.
Saturday, December 16: Alderton was three months pregnant when she died, police confirm. CCTV pictures of the last known movements of Alderton are released.
Sunday, December 17: More than 10,000 calls from members of the public have been received by police. Alderton's boyfriend Sam Jefford, 21, tells The Sun he has lost the "two most precious things" in his life.
Monday, December 18: Man, 37, arrested in nearby village of Trimley, Suffolk. Media reports say he is Tom Stephens, a supermarket worker.
Tuesday, December 19: A second man, 48, arrested at his home near Ipswich in connection with all five deaths.
An Ipswich police officer talks to a female prostitute known as Lou.