New Delhi: Four more athletes on Friday tested positive for banned substances, taking the total number of dope flunk cases in the recently concluded National Games in Jharkhand to 13.

NADA Director General Rahul Bhatnagar told PTI that the 'A' urine samples of two boxers, one wrestler and one equestrian player have returned positive in the results obtained on Friday.

"The two boxers tested positive for stimulant methylhexaneamine. It was a steroid in case of the wrestler and sabutamol-beta-2 in case of the equestrian player," he said.

After four positive results, the number of dope cases has risen to 13. Three are from athletics, two each from rowing, boxing and equestrian, and one each from taekwondo, basketball, cycling and wrestling.

A total of 308 samples was taken during the February 12-26 National Games and Bhatnagar had yesterday announced that nine athletes had tested positive for banned substances from the 200 results which have come after being tested at National Dope Testing Laboratory.

"Today, the results of nearly 100 samples have come and four more tested positive. Only 10-15 samples remain to be tested," Bhatnagar said.