Peru's attorney general has ordered the arrest of two suspects in the killing of a Canadian man who traveled to the Amazon rain forest to study hallucinogenic medicine.

Authorities have said that a mob dragged Sebastian Woodroffe by the neck to his death shortly after people accused him of killing Olivia Arevalo, an octogenarian plant healer from the Shipibo-Konibo tribe of northeastern Peru.

Prosecutors said Monday the two suspects were identified in a video shot on a cellphone showing the moment Woodroffe was killed last week.

Officials say forensic experts are studying Woodroffe's body to determine whether he had any involvement in Arevalo's killing as was initially suggested.