UPDATE: Police have named Chungqi Jiang, a 40-year-old construction worker, as the man arrested in relation to Guang Hua Liu's murder. Jiang had been involved in a four-year relationship with Liu, police said at a press conference on Monday afternoon.

BRAMPTON, Ont. -- Police say they have made an arrest in the case of a single mother whose body parts were found scattered in Toronto area waterways.

Peel Regional Police have not released any details but have scheduled a news conference for noon Eastern Time.

Guang Hua Liu (GWANG-WAH-LOO), 41, was reported missing on Aug. 11, one day after her friends dropped her off in front of a now-defunct spa she used to own called Forget Me Not Health Centre in east Toronto.

On Aug. 15 Liu's right foot was found in the Credit River in Mississauga, Ont., about 45 kilometres west of her home.

Liu's head and hands were later discovered in the river in the Hewick Meadows Park area. Two calves, a thigh and an arm were found in West Highland Creek, just blocks from where she lived.

Forensic tests determined all the remains belonged to Liu, but police still do not know how she died. Investigators have said they do not believe there are other victims.

This is a developing story. More to come...

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  • A handout photo of Guang Hua Liu released by Peel Regional Police is shown at a press conference in Mississauga, Ont., Tuesday, August 21, 2012. Police have identified Liu as the victim whose body parts were found in Toronto and Mississauga last week. THE CANADIAN PRESS/ Peel Regional Police - HO

  • Peel Regional Police Constable Erin Cooper holds a photo during a press conference in Mississauga, Ont., Tuesday, August 21, 2012 of Guang Hua Liu as they announce the body parts found in Toronto and Mississauga last week belonged to the 41-year old single mother of three. THE CANADIAN PRESS/Michelle Siu

  • A police team is seen in Hewick Meadows Park in Mississauga, Ont., after discovering a female severed head in the Credit River on Thursday Aug. 16, 2012. Investigators said they found a severed human foot the in the area the previous day. (AP Photo/The Canadian Press, Aaron Vincent Elkaim)

  • Police block off access to Hewick Meadows Park in Mississauga, Ont., after discovering a female severed head in the Credit River on Thursday Aug. 16, 2012. Investigators said they found a severed human foot the in the area the previous day. (AP Photo/The Canadian Press, Aaron Vincent Elkaim)

  • Police search the Credit River in Hewick Meadows Park in Mississauga, Ont., after police discovered a female severed head on Thursday Aug. 16, 2012. Investigators said they found a severed human foot the in the area the previous day. (AP Photo/The Canadian Press, Aaron Vincent Elkaim)

  • A police dog searches the banks of the Credit River in Hewick Meadows Park in Mississauga, Ont., after police discovered a female severed head on Thursday Aug. 16, 2012. Investigators said they found a severed human foot the in the area the previous day. (AP Photo/The Canadian Press, Aaron Vincent Elkaim)

  • A police search dog unit searches the banks of the Credit River in Hewick Meadows Park in Mississauga, Ont., after police discovered a female severed head on Thursday Aug. 16, 2012. Investigators said they found a severed human foot the in the area the previous day. (AP Photo/The Canadian Press, Aaron Vincent Elkaim)