Police have launched another search in the Ballarat area as part of their investigation into the disappearance and alleged murder of Samantha Murphy.

Detectives from the Missing Persons Squad alongside specialist interstate and federal police are involved in the operation, which comes seven months after the 51-year-old was last seen alive on February 4.

Patrick Stephenson, 22, was charged with the murder of the missing mother-of-three in March but her body is yet to be found.

Samantha Murphy’s mobile phone was found on the edge of a dam on farmland near Ballarat in June. (Nine)

The last significant breakthrough in the search came in May when Murphy’s mobile phone was located on the edge of a dam on farmland near Ballarat.

Murphy’s family has been advised of the search, which will resume tomorrow.

Police have asked members of the public to not attend the search area.

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