Sundar Singh Gurjar is a javelin thrower from Jaipur, India. He qualified for Rio after defeating the world champion Devendra Jhajharia in the selection matches held in Gandhinagar in January this year.
A police investigation was started when a juice shop owner in Jaipur told the police that some people had offered him money for adding a substance in the juice of athlete Sundar Singh Gujjar.
Sunder Singh is aiming for gold at the Rio Paralympics.