The Indian CWG squad swimmers Richa Mishra and Jyotsana Pansare along with Amar Muralitharan were tested positive for methylhexaneamine, a stimulant banned by the World Anti-Doping Agency in 2010.
Richa Mishra was selected as the best female swimmer of the 64th National aquatic championship in Jaipur.
Secretary of Indian Swimming Federation, Virender Nanavati, confirmed the development and told the media that both Richa and Jyotsana will be withdrawn from the team if their 'B' samples also turned out to be positive.
"We have been informed by the National Anti-Doping Agency about the three swimmers failing dope tests. Their samples were collected during the National Championships in Jaipur," said Nanavati.
"They can ask for a 'B' sample test but that is their individual decision. We will see what happens after that procedure is completed. If the 'B' samples of Richa and Jyotsana also test positive they will be withdrawn from the team. I can't say whether we will have the replacements," he added.
Richa won three individual gold medals with one meet record during the Nationals and Jyotsana won a gold in the 100m backstroke event in Jaipur.
Earlier on Thursday, Sep 2, three other Indian wrestlers, including one Arjuna award winner, were failed in NADA dope test and national federation suspended them from the CWG squad.