Amnesty : at least two seized in Sintet in `` witch-hunt '' campaign . Members of Jammeh 's personal guard , known as `` green boys , '' are also alleged to have taken part in the campaign . Victims forced to drink dangerous hallucinogenic potion ; at least two have died . Amnesty says Gambians President Halifa Sallah is behind the campaign . Jammeh reportedly believes witchcraft involved in aunt 's death , Amnesty says .
Amnesty : at least two seized in Sintet in `` witch-hunt '' campaign . Victims forced to drink dangerous hallucinogenic potion ; at least two have died . Amnesty says Gambians President Halifa Sallah is behind the campaign . Jammeh reportedly believes witchcraft involved in aunt 's death , Amnesty says .