The crime was committed sometime between July 7 and August 7, according to the suspects.
The suspicion concerns murder and a crime against public peace, police spokesman Thomas Johansson told TT.
The suspected murderer has not been identified, and he does not want to comment on whether it is a man or a woman, or where the person was found.
It's not very common for us to maintain such strict confidentiality, but there are reasons for it, he says.
