Rajaram (45) and Vasantha (40), last night hung themselves inside their room, police said.
In a suicide note which they have left behind, the couple state that they were humiliated within their community after their daughter refused to marry a boy from her own caste, sub-inspector Mahender Reddy said.
Their daughter instead wanted to marry a boy from another caste with whom she was in love, police said, adding that an investigation is on into the case.