The 23-year-old woman, working in a private firm fell in love with her colleague and got married in March. Both were living in the man's house near Mettupalayam, along with his parents and sister, police said.
However, the in-laws, came to know about her caste background and allegedly abused and called her by her caste name and asked her to move out of the house yesterday, they said.
However, they did not turn up and are said to be absconding following which cases under SC/ST (Prevention of Atrocities) Act and IPC were registered against them, police added.