The raid which started in the afternoon was led by doctor Ankush Gupta anf four members from NADA who raided the rooms of campers at NIS and took their urine samples.
"We have sent a four-member team to conduct the raid," said a top NADA official.
"The team will be searching the rooms of the athletes. They will also collect samples from the athletes," said the official.
"A four-member team raided NIS, searched the rooms of the campers there and took urine samples also for dope testing. Dr Ankush Gupta was the team leader and there was one lady officer of NADA also," said, Rahul Bhatnagar, NADA Director General.
Bhatnagar said that the raid was a routine of the NADA to check if the athletes were on drugs.
"It was not directed to track and field athletes. The team raided the rooms of other non track and field campers also and took samples from them. It was part of our routine drive under our increased vigilance to tackle doping," he said.
The raids were conducted against the back drop of eight athletes failing the doping test. A probe has been ordered into the incidence by the sports ministry.