Javelin thrower Davinder Singh, who was London-bound to compete in the world championships, has tested positive for marijuana after samples were taken during the third leg of the Indian Grand Prix in New Delhi in May.

Marijuana is a specified substance under the World Anti-Doping Agency code and hence Singh has not been provisionally suspended but he will have to face a disciplinary panel of the National Anti-Doping Agency (NADA). He could further face a sanction under the Narcotic Drugs and Psychotropic Substances Act.

“An athlete who participated in the Indian Grand Prix in New Delhi has tested positive for marijuana. As marijuana falls under the specified substances list as per the WADA code he has not been provisionally suspended. However, we will have to go into the details of his case to see if he has can be prosecuted under the narcotic drugs act.” NADA director general Navin Agarwal said on Friday.

Read: NADA suspends Indian track and field athlete over doping

Davinder Singh was slated to take part in the Asian Athletics Championships to be held in Bhubaneshwar in July. He had also qualified for the World Championships in London when he clinched a gold medal with a throw of 84.57 meters during the 1st leg of the Indian Grand Prix in Patiala.