WADENA, Minn. (AP) — Authorities in Wadena County say the search of a farm has turned up bone fragments.

Sheriff Michael Carr says in a statement that authorities went to the farm Monday with a warrant to look for human remains.

Carr says numerous bone fragments were found and are being tested.

Few other details were released because the investigation is ongoing, but Carr says the search isn't related to the high-profile disappearance of Jacob Wetterling, who's been missing since 1989, or Carla Anderson, who was 23 when she disappeared from Wadena in 1987.

KARE-TV reports that 50 to 60 law enforcement officers went to Dan Hanson's farm with a backhoe Monday and started digging at an old excavation dump. KARE reports authorities dug up an area about the size of a tennis court.

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WADENA, Minn. (AP) — A search warrant says authorities digging at a farm in Wadena County are looking for human remains.

But, state and local officials didn't immediately say if anything was found. Dan Hansen says 50 to 60 law enforcement officers showed up at the farm with a backhoe Monday and started digging at an old excavation dump created years ago as part of the family business.

KARE-TV  reports Wadena County sheriff's deputies and officers from the state Bureau of Criminal Apprehension dug up an area about the size of a tennis court on the 160-acre property north of Wadena.  According to KARE, but Hansen suspects investigators were looking for remains belonging to Carla Anderson, who was 23 in 1987 when she disappeared.  She was last seen at her Wadena apartment house.

Hansen says he's angry that authorities just showed up and started digging. He questions what evidence they had to obtain the search warrant. BCA referred questions about the search to Wadena County sheriff's officials who did not immediately return a call for comment.