Aiming Guinness record, a 19-year-old college student in Tamil Nadu swam five km in the Bay of Bengal with his and legs bound with an iron chain.
S Sabarinathan covered the distance on Thursday in two hours, 20 minutes and 48 seconds, District Sports Officer B Siva said.
The earlier record was set by 37-year Gopal Kharvi in Malpe beach in Udupi in Karnataka in 2013 by swimming 3.07 km with handcuffs and leg shackles in two hours 43 minutes.
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Sabarinathan's attempt has been video recorded from start to finish and has been sent to the Guinness committee, he said.