A family of four persons, a couple and their two children, were murdered and buried in the backyard of their own house. Police, who arrived on information of locals, suspected witchcraft to be the reason behind the murder. The incident took place at Thodupuja village of Idukki district in Kerala. The owner, Krishnan was owner of a rubber plantation. He was used to doing witchcraft at nights. The culprits hammered him and his family members to death and buried them, police said.