The National Museum of the Philippines commissioned a team of experts to look into this claim, but as of February 6, 2011, the anthropologist asked to study the claim in response to a petition to declare Sitio Mikasili, Barangay Tangkulan, Damulog as a National Heritage Site said that there is not enough evidence to declare it as such. Dr. Antonio Montalvan, an anthropologist who earlier supported the petition to declare the site as a heritage site wrote the National Museum saying that after deeper scrutiny of the claims, a declaration of a National Heritage site is not feasible. Montalvan said: "Such an important declaration cannot be made when the assumptions lack unanimity and more so in material evidence.