India, April 18 -- Two-time Paralympics champion Sumit Antil has levelled allegations of "verbal abuse and mental harassment" against his former coach Naval Singh.

Antil has been supported by two-time Olympic medallist Neeraj Chopra who said the coach has also used "abusive language" against him and his family. Both champion javelin throwers have written to the Sports Authority of India (SAI) demanding strict action against the coach, who is a Dronacharya awardee.

Singh is no longer Antil's coach but continues to train several athletes, including India's rising javelin star Sachin Yadav at the JLN Stadium here.

"Over a prolonged period I have personally experienced repeated instances of verbal abuse, humiliation and mental harassment u...