(Newser) – The severed head of a young black man was found on the front steps of a Mississippi home and police are working to identify him, the AP reports. Jackson Police Cmdr. Tyree Jones says the rest of the man's body has not been located. The head was found Saturday about 9am. Jones says authorities do not yet have a motive for the killing. Asked whether it might be gang-related, he refused to speculate. He did say that finding just the head was not a typical homicide scene. Officials say the cause of death, at this time, appears to be severance. (Read more decapitation stories.)