The CCTV visuals show V. Sankar, 23, a third-year engineering student, and Kausalya, 19, were conversing while strolling when suddenly three motorbike-borne men arrive and launch the attack on Sankar with sharp weapons.

After him, the attackers target his wife and beat her up. Sankar, who comes from Dalit community, and Kausalya, from the politically powerful Thevar caste, married eight months ago.

According to police, Kausalya's family was unhappy with her marriage outside the caste. The woman's father has surrendered in court and denied having played any role in the attack, police said.

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