CORYDON, Ind. (AP) – Authorities in southern Indiana say they’re investigating after someone apparently exhumed the grave of a woman buried in the 1880s.

Officials say Indiana conservation officers were called to a large wooded area this spring when a landowner in Harrison County found the exhumed gravesite. The News and Tribune reports archaeologists surveyed the gravesite and collected evidence that was sent for analysis. The grave belonged to Nancy Brown, who died at age 47 in 1881.

It’s unclear when the grave was exhumed. A photo from the state shows an upright stone marker at the top of a 3 to 4-foot deep empty hole in the ground.

Conservation Officer Jim Schreck says another grave in the small private cemetery was looted in 1998. Investigators are asking anyone with information to come forward.