HOUSTON (AP) — Investigators are trying to determine if severed heads discovered last month near lakes in Texas and Louisiana are part of the same gruesome case.

Read More: Dallas-Fort Worth News

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The Houston Chronicle reports the two unidentified victims were white women with reddish hair and good teeth. The heads were found in plastic bags and in similar surroundings — about 150 miles apart — at Lake Houston and near Calcasieu Lake.

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Some volunteers doing cleanup near Lake Houston made the macabre discovery March 24, in Huffman, on some rocks. In Cameron Parish, a prison inmate doing cleanup labor found a severed head March 1 in a grassy marsh next to Louisiana Highway 27.

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No one has been arrested. The Cameron Parish Sheriff’s Office and Houston police acknowledge similarities in the cases and are sharing information.