Cold Case detectives investigating the disappearance of a young woman 20-years-ago are digging up a West Perth backyard in search for clues.
Lisa Brown went missing on November 10, 1998.
She was last seen by her boyfriend, walking down Brisbane Street near Palmerston Street in Northbridge.
Police believe the mother-of-two, who was a sex worker, was murdered.
Her body has never been found.
Det-Insp Lesa Brittain, from the cold case serious crime squad, said they had recently received fresh information which led them to dig up the backyard of the West Perth property.
“At the moment we’re excavating the rear of the premises… we’re looking for items of interest and I can’t elaborate any further on that at this stage,” Det-Insp. Brittain said.
Det-Insp Brittain said the current owners of the Carr Street home are in no way linked to Ms Brown or her disappearance, bur the people who lived at the home at the time she went missing were "associated" with her.
“There is a reward of $250,000 for any information that leads to the arrest of anyone involved in the disappearance of Lisa Brown,” she said.


Hayden Ballantyne signs with Rockingham Rams
Mayor reassures community that 'no decision has been made' to close 4WD access at Tim's Thicket, White Hills beaches
DBCA 'sick and tired' of illegal access to Port Kennedy Scientific Park
Mandurah homeless camp goes up in flames
Dawesville community shocked after kangaroo deliberately mowed down
Teens armed with knife, scooter charged over Rockingham Shopping Centre fight
Mandurah private school teacher charged with alleged sexual abuse of male student
Welfare concerns for missing Ravenswood girl
Detectives investigate Rockingham aggravated robbery