WA Police have raided two properties with links to an outlaw motorcycle gang in relation to a cold case murder investigation, after receiving "very credible information" regarding the disappearance of a Goldfields woman.
The raids on the Club Deroes headquarters in Kalgoorlie and the Perth suburb of Cloverdale come more than 18 years after Lisa Govan disappeared from Kalgoorlie.
Ms Govan's body has never been found but police are treating the case as a homicide.
Following the raids, WA Police announced they were increasing the reward for information about the case from $50,000 to $250,000.
Ms Govan was 28 when she vanished from Kalgoorlie in 1999, and was last seen on the morning of October 8 outside the Foundry Hotel bottle shop on Boulder Road.
Police Commissioner Chris Dawson said the Club Deroes' headquarters in Kalgoorlie was, at the time, adjacent to where Ms Govan was last seen.
"People associated with the club are a focus of our investigation," Commissioner Dawson said.
"They are not the only focus, but they do remain a point of investigation."
But he would not reveal what police were looking for, or what if anything they found as a result of today's raids.
Commissioner Dawson urged anyone who knew anything about the case to come forward, saying people could do so anonymously.
"We strongly believe there are people out in the community who know what has happened to Lisa," he said.
"Ms Govan's family deserve answers and the community deserves answers."
Despite extensive inquiries by police and family, Ms Govan's whereabouts remain a mystery.
'We can only hope': family
Speaking after the police announcement, Lisa's father Ian Govan said he hoped someone would come forward with new information.
"It's been a long time. A lot of people have moved on, out of town," he said.
"People have got knowledge with them.
"Hopefully, the announcement of this increase in the reward will bring somebody forward. We don't know. We can only hope."
"It doesn't get any easier with time either," Ms Govan's sister Ginette Jackson added.
"It's still heartbreaking, even after 18 years, it doesn't change."
At the time of her disappearance, police investigating the case said they were struggling with the code of silence synonymous with outlaw motorcycle gangs.
That prompted the then State Government to offer a $50,000 reward for information leading to the apprehension or conviction of those responsible.
