 Little is known about these people, because of FUNAI's refusal to let anthropologists study the group.After a long history from the 1950s of massacres of this indigenous people a special department of FUNAI organized an expedition in 1996 to establish a first peaceful contact with them.The Korubo in the past have killed trespassers on their land and the latest incident occurred in the year 2000, when Korubo warriors killed three lumbermen near the Native Reservation.