Detective Chief Inspector Nicola Wall, from the Homicide and Serious Crime Command said:
"The Homicide and Serious Crime Command are still in the early stages of this investigation and urgently require the assistance of the public to help us establish the circumstances around the murder of this young woman.
"We are specifically appealing to anyone who witnessed anything suspicious towards the latter part of last week. Did you see anyone moving a heavy black trolley type suitcase on or after the 18 July, especially around the Thornfield Avenue/Dollis Road entrance of the wooden area?
"We are also interested in hearing from anyone who is concerned about any young adult females who have gone missing from the immediate area recently.
"If you have any information that can assist us with our inquiry please do get in contact with the police".
Any witnesses or anyone with any information should contact the incident room on 0208 785 8334; if you wish to remain anonymous call Crimestoppers on 0800 555 111.
More top news
A man who fired at officers from the National Crime Agency has been convicted at the Old Bailey.
Want to know its posh name? It's a 'Track Retrieval Device'.
Unite said its members in the capital's 18 bus operators had supported walkouts by 85%, and action short of a strike by 9-1.