New Delhi, April 28 -- The Narcotics Control Board(NCB) and Gujarat Police ATS Saturday busted three "clandestine" drug manufacturing labs in Rajasthan and Gujarat leading to the seizure of 300 kgs of narcotics and arrest of seven persons.

Narcotics Control Bureau (NCB) Deputy Director General (Operations) Gyaneshwar Singh in a statement said the labs were unearthed after about three months of "intensive" technical and ground surveillance that was mounted by the two agencies to identify the people involved in the network as well as the locations of the labs.

A total of 149 kgs of mephedrone or 'meow meow' (both in powder and liquid form), 50 kg ephedrine, and 200 litres of acetone was recovered from the three labs located in Bhinmal of Ja...