Though the incident took place at Lodhusha village in Tikayatpalli area on December 30, it came to light yesterday and one person was arrested in this connection, they said.
"We have arrested one Pramod Behera. We suspect that he is mentally disturbed. Investigation is on," said inspector-in-charge (IIC) of Tikayatpalli police station, K Bariah.
Pramod allegedly attacked the three with a sharp weapon as he suspected that they had caused him bad luck by practising sorcery.
While Dhrubacharana Sahu and Daitari Sahu died after the attack, Daitari's mother Chandani Sahu is undergoing treatment at a hospital, he said.
The incident took place when Pramod attacked Dhurabacharana with a sharp weapon when the latter was sleeping in the house, said Bariah. Pramod then attacked Daitari Sahu who was busy in harvesting outside.
When Dharitri raised an alarm his mother Chandani Sahu came rushing to his aid. In a fit of rage, Pramod attacked the elderly woman too the IIC said.
