Jane Nartare Beaumont Arnna Kathleen Beaumont (aged 7), and Grant Ellis Beaumont (aged 4) were three siblings collectively known as The Beaumont Children who disappeared from Glenelg Beach

Glenelg, South Australia

Glenelg is a popular beach-side suburb of the South Australian capital of Adelaide. Located on the shore of Holdfast Bay in Gulf St Vincent, it has become a popular tourist destination due to its beach and many attractions, home to several hotels and dozens of restaurants.Established in 1836, it is...

 near Adelaide

Adelaide

Adelaide is the capital city of South Australia and the fifth-largest city in Australia. Adelaide has an estimated population of more than 1.2 million...

, South Australia

South Australia

South Australia is a state of Australia in the southern central part of the country. It covers some of the most arid parts of the continent; with a total land area of , it is the fourth largest of Australia's six states and two territories.South Australia shares borders with all of the mainland...

 on Australia Day

Australia Day

Australia Day is the official national day of Australia...

 (26 January) 1966.

Their case resulted in one of the largest police investigations in Australian criminal history and remains Australia's most infamous cold case.

The huge attention given to this case, its significance in Australian criminal history, and the fact that the mystery of their disappearance has never been explained, has led to the story being revisited by the press

News media

The news media are those elements of the mass media that focus on delivering news to the general public or a target public.These include print media , broadcast news , and more recently the Internet .-Etymology:A medium is a carrier of something...

 on a regular basis.