Inter Caste Marriage Behind Family Murder In AP Village?

The sensational murder of mother, daughter and son in Garladinne village of Anantapur district raised strong doubts. It is suspected the inter caste marriage is the main reason behind the gruesome incident.  

B Mallappa and Meenakshi, belonging to different castes,  got married four years ago. They have one son and a daughter. The family members of Mallappa and his wife developed grudge each other against the inter caste marriage.
  
When Mallappa was out of station, unknown persons assaulted his wife and children who were killed on the spot. Police registered murder case and launched investigation into the incident. They are suspecting the murder is the handiwork of family members.