Lima - Police in Peru say a shaman has been arrested after confessing to burying an 18-year-old United States citizen who died after eating a hallucinogenic plant during a ritual.

Two other men have also been arrested for allegedly helping shaman Jose Manuel Pineda bury the young man, who died at a spiritual retreat in Puerto Maldonado in the Madre de Dios jungle region.

Authorities said on Wednesday that the shaman, who calls himself “Maestro Mancoluto”, told them that Kyle Nolan died after exceeding the dosage of a medicinal plant called Ayahuasca on August 22.

Nolan arrived in the city about 860km east of Lima on August 17 and was reported missing on August 27 when he didn't return to the United States.

Nolan's hometown hasn't been released. - Sapa-AP