Authorities said that skeletal remains were ound in an old Studebaker believed to be tied to the 1971 disappearances of Cheryl Miller and Pamella Jackson, two 17-year-old girls from South Dakota, CBS News reported.

Crews were seen lifting rusted and mangled hulk from an embankment in Brule Creek near Elk Point South Dakota on Tuesday afternoon, news reports said.

The two girls were last seen 42 years ago on May 29 driving a beige 1960 Studebaker Lark on their way to a party. A firsherman called authorities after noticing one of the car's wheels, the police reports documented.

State and local agency leaders have said that some potential pieces of evidence have been taken from the site and still need to be processed in order to confirm their identities, the Daily Blotter said.

Authorities did not release any additional information, saying that an autopsy and more testing will still be necessary.

A man serving a prison sentence on unrelated charges had been indicted for murdering Miller and Jackson, but those charges were then dropped after prosecutors found out that the confession he had given to an inmate was faked.

The South Dakota's cold case unit, which was formed in June 2004, have focused on unsolved suspicious deaths and disappearances, news reports said.