(CNN) -- Human remains discovered in the Utah desert belong to a young male and are not a missing 28-year-old mother, authorities said, a grim discovery that fuels the mystery and opens a new case. The fate of Susan Powell, who disappeared in 2009, is still unknown. The remains discovered in Tooele County over the weekend belonged to a young man, Sheriff's Detective Lt. Travis Scharmann said. Scharmann said the state medical examiner is working to determine the cause, time and other circumstances of his death. In addition to Powell, authorities must now determine what happened to the man whose remains were found in the same region on Sunday.
@highlight
The fate of Susan Powell, who disappeared in 2009, is still unknown
@highlight
The remains discovered over the weekend belong to a young man, police say
@highlight
The grim discovery fuels the mystery of the missing woman
Josh Powell says he last saw his wife on a cold December night in 2009 as he and his two young sons left to go camping in the @placeholder desert area.