Missing Melbourne woman Jill Meagher may have fallen victim to a predator stalking the streets of Brunswick, one of the city's late-night bar and restaurant centres.

Organisers of an annual memorial event for people killed in tragic or criminal circumstances are calling for a national remembrance day for victims along the lines of Anzac Day.

Police say the disappearance of pregnant Auckland woman Rae Portman is now being treated as a homicide.

Police are concerned for the safety of a missing Te Awamutu woman.