"Gupta had inadvertently ingested a prohibited substance (terbutaline), which can be commonly found in cough syrups," said the BCCI in a statement.
The disgraced sprinter relinquished the five Olympic medals she won at the 2000 Sydney Games after admitting to the use of a prohibited substance.
The former world 100 metres record holder was banned for doping offences related to the BALCO laboratory in California.
Javelin thrower Amit Dahiya was banned for four years for evading dope sample collection by sending a proxy during the National Javelin Throw Open Championships last year.
Dope-tainted lifter Shailaja Pujari, who is facing a life ban after flunking a National Anti-Doping Agency test recently, on Thursday pleaded her innocence. Shailaja, who competes in 75-kg category, was found by the NADA positive for an anabolic steroid.
The Tour de France was hit by doping again on Wednesday when Moises Duenas Nevado of the Barloworld team became the second Spaniard to test positive for the blood-boosting erythropoietin (EPO). The French-Anti Doping Agency (AFLD) said that Duenas Nevado, who joined Barloworld two years ago, had failed a dope test after last week's fourth stage, a time trial in Cholet.
The representative of the World Anti-Doping Agency in Pakistan on Monday slammed the Indian Premier League organisers for prematurely identifying the player who failed a dope test during the tournament.
Indian Premier League commissioner Lalit Modi has confirmed that a player tested positive in the World Anti-Doping Agency 's random dope test, conducted during the inaugural Twenty20 tournament in India.
Pakistan's provisional squad for the World Cup in the West Indies also included Shabbir Ahmed who last month completed a 12-month ban for having an illegal bowling action.
Landis issued a press release calling Pound's comments "defamatory and absurd" and accusing Pound of branding him as guilty.
AC Milan striker Marco Borriello has been suspended after testing positive in a routine doping test.
The World Anti-Doping Agency will conduct dope tests on players participating in the Indian Premier League.
Both players have been told to stop talking to the media before their appearance next week at a doping tribunal.
Basketball player Satnam Singh Bhamara, who became the first Indian to be drafted into an NBA team before being banned or doping, has decided to try his hand at wrestling by sealing a deal with a professional league in the United States.
Olympic 100 metres champion Justin Gatlin has been banned for four years for a 2006 positive test for testosterone.
The American sprinter was officially stripped of her World Championship gold medals from the 100 and 200 metres.
11-time Indian 100m champion Adille Sumariwalla says it was wrong to suspend athletes who went missing when WADA officials came calling.
Samples from the probables for the Twenty20 World Cup, including fast bowlers Shoaib Akhtar and Mohammad Asif, have been taken for testing by WADA laboratory.
The US Anti-Doping Agency has accused him of serious doping violations after a federal investigation into the BALCO laboratory in California.
The stars tested negative after their urine samples were re-tested for the newly-discovered steroid THG.
A summary of sports events and sports persons, who made news on Thursday
The Athletics Federation of India (AFI) has pulled out dope-flunked shot putter P Udaya Laxmi from the home squad for the ongoing Asian Championships in Pune after testing positive for a banned substance.
The drug bust has been described by the USADA as the largest in the the sport.
Pakistan fast bowler Mohammad Asif is challenging his positive test result for a banned substance during IPL.
The American cyclist will not participate in any race in France till the end of his disciplinary hearing.
Olympian shooter Manu Bhaker, sprinter Dutee Chand and swimmer Srihari Nataraj are some of the big names to feature in the Khelo India University Games to be held in Bengaluru from April 24 to May 3.
After Panwar's 'A' sample was found positive, the Indian Weightlifting Federation (IWF) suspended her provisionally.
WADA will target the entourage of athletes, who encourage them to take banned substances
Costas Kenteris and Katerina Thanou were among a group of Greek athletes to be tested by doctors from WADA.
The world 100 metres record holder has appealed to the Court of Arbitration for Sport against a possible life ban for doping.
FINA has ruled that seven Russian swimmers, including breaststroke medal hopeful Yulia Efimova, are ineligible to compete in the Rio Olympics, world swimming's governing body said on Monday.
The Kremlin said on Monday it welcomed the decision by the International Olympic Committee (IOC) which allowed clean Russian sportspeople to compete in next month's Rio Olympics.
The Turkish Athletics Federation (TAF) has given two-year suspensions to 31 athletes for drug violations, it announced on Monday. At least three of the athletes competed at the 2012 London Olympics, including hammer thrower Esref Apak, the 2004 silver medallist.
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