ROSEVILLE (WKZO) -- The mystery continues, at least for another day, in the cold case mystery of missing Teamsters boss Jimmy Hoffa.

Roseville police got a tip that Hoffa may be buried underneath the driveway of a home once owned by an alleged bookmaker with ties to the Mafia.  Authorities used ground penetrating sonar, and found an unidentifiable object, which led them to drill through the concrete and take soil samples.

The samples are being analyzed by a Michigan State University forensic anthropologist.  If human decomposition is found in the samples, authorities say they will meet with the FBI, Michigan State Police and Michigan State University to decide their next move.  Roseville police Chief James Berlin says, it would most likely involve an excavation of the area.

Hoffa vanished from a suburban Detroit restaurant parking lot in July 1975.