ALBUQUERQUE, N.M. (AP) — University of New Mexico police are trying to determine who left a severed goat head on the porch of a fraternity house.

Members of the Phi Gamma Delta fraternity found the head last week and reported it to authorities.

Phi Gamma Delta President Javier Manriquez says that after he saw the head, he took a photo of it and threw it out.

Manriquez says there was a note attached to the partially-skinned goat head. He says the note had the word “done” written on it with a heart over the letter “o.”