A Spanish citizen with 3kg cocaine worth Tk50 crore was detained at Shahjalal International Airport in Dhaka.Officials of the Department of Narcotics Control conducted a drive and detained Thias with the cocaine on the basis of the information provided by an intelligence agency of USA.Detainee Thias Spejo Julius arrived at the airport on an Emirates Airlines flight from Brazil around 5:55pm Tuesday.NCD Director (Operations) Syed Towfiq Uddin Ahmed ensured this to journalist.He said, the cocaine was kept in a special chamber in his luggage which was not noticed in the scanner at first.The director said the estimated price of the cocaine is Tk50 crore.