Sharma has now been kept under round-the-clock observation for 24 hours at the Deen Dayal Upadhyay (DDU) hospital here.
"He has been found fit and fine in the medical examinations but doctors have kept him under observation for next 24 hours to watch his activities as a precautionary measure," said Pushpendra Kumar, DCP (west).
Sharma also claimed to have consumed a heavy dose of anti-depressants before trying to hang himself, jail sources said. However, jail officials rubbished his claim.
Immediately after he was found trying to hang himself, he was taken to the jail dispensary where a doctor examined him and declared him medically fit, said the jail official.
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The doctors attending on Sharma said on the condition of anonymity that he was fine but whether he had consumed a heavy dose of anti-depressants could be verified after further tests.
"I had met him 15 days ago and found him in a normal condition and there were no signs that he was going to do anything like that," he said.
The 23-year-old victim was brutally assaulted and raped by six persons in a moving bus in south Delhi on December 16, 2012, triggering nation-wide shock and outrage. She was later shifted to a Singapore Hospital where she died.
Prime accused Ram Singh was found dead in his cell in Tihar Jail in March 2013 and proceedings against him were subsequently abated. A juvenile accused in the case was convicted and sentenced to a maximum of three years in a reformation home. He was released from there in December last year.
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