Water police and divers may return to the Maribyrnong River on Saturday morning, as the search for missing mother Karen Ristevski continues.

Police scoured the water downstream of the family's house in Avondale Heights on Friday afternoon, in response to information received from a member of the public.

Water police searched the river for almost three hours, focussing on an area in Maribyrnong near the Anglers Tavern.

The search area is almost six kilometres downstream from the Ristevskis' house in Oakley Drive.