In Orissa, Maoists have hacked to death a father-son duo in Malkangiri district late last night. The Maoists who came in a group called the father-son duo to a nearby field from their home and slit their throats allegedly for exploiting the poor. The bodies were recovered this morning. The Maoists have left a hand-written poster on the spot stating the reason of the killings. Meanwhile, police is yet to reach the spot. The fresh killings have unleashed terror in the Malkangiri district again. Prakash Dash, Bhubaneswar, Mail, 1325 hrs