"Manju Bala's medal has been upgraded as one of the two Chinese athletes who finished above her has turned in a positive dope test," said a source within the Indian contingent here who has been informed by one of the athletics technical officials.
Manju threw the chain and ball to 60.47m, considerably shorter than gold medal winner Zhang Weinxiu -- who set a new Games mark of 77.33m -- and silver winner Wang Zheng (74.16m), both from China on September 28.
An official announcement on this matter is expected sometime later.
This is the first dope offence in these Games which has affected the result of an Indian competitor.