The Narcotics Control Bureau (NCB) has seized over four kilograms of Mephedrone (MD), a synthetic stimulant dru,g from Sanchore, Rajasthan. In a statement, NCB said that three persons were apprehended in the operation carried out along with Anti Narcotics task Force, Rajasthan and Jalore Police. During the operatio,n various laboratory and industrial equipment including Borosilicate jars, thermometers and other related items used for the manufacture of synthetic drugs were also seized. NCB said that the action was taken under Operation PRAYOGSHALA.