Cagey on Munnings link

It is understood the operation related to the long-running investigation into the disappearance of young mother Helen Munnings.

"Police attended a Cooee property yesterday as part of a planned operation," police said on Thursday.

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"There is no risk to the community and police would like to thank members of the public for their understanding."

They were asked if it related to the Munnings case, but would not confirm or deny that.

They were also asked if they could provide an update on the case, but did not.

Ms Munnings disappeared from the Burnie area on July 23, 2008.

A coroner in 2012 determined she died on or about that day.

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Police strongly suspect she was murdered.

Her body has never been found and nobody has been charged.

"Investigators have long held the view that there are people in the community who have knowledge of Helen's disappearance who, for whatever reason, have not either been able to come forward or have been unwilling," Western District Commander Debbie Williams said in 2019.

A reward for information leading to a conviction was increased from $50,000 to $250,000 in 2019.

Ms Munnings' mother, Karel Black, on Friday urged people to go straight to the police if they knew or heard anything relevant.

"It's shattering," Ms Black said of the situation.

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