05/02/2013 02:52 EDT | Updated 07/02/2013 05:12 EDT

RCMP, family, seek new tips in 1983 disappearance of girl near Hinton, Alberta

HINTON, Alta. - RCMP and a grieving mother are marking the 30th anniversary of the disappearance of a girl in western Alberta by calling for new tips in the case.

Shelly-Anne Bacsu (bah-shoo) was last seen on May 3, 1983, just outside of the town of Hinton.

Police say they still hope someone will come forward with information to help solve the mystery of the 16-year-old's disappearance.

The girl's mother, Muriel Bacsu, says she believes someone in the town knows what happened to her daughter and will speak up to end their family's nightmare.

Bacsu says RCMP contacted her last month when remains were found by people riding all-terrain vehicles near the hamlet of Brule (broo-LAY'), a community just west of Hinton.

RCMP say the remains, which may not be human, are still being tested and have not been linked to the girl.