NEW DELHI: The Customs officials at Indira Gandhi International Airport has arrested four Indian passengers on charges of drug smuggling after contraband worth around Rs 9 crore was seized, officials said on Thursday.The passengers arrived from Bangkok on April 21 and were intercepted by officers based on profiling.Their baggage was scanned using X-ray machines and later checked in detail, during which nine polythene packets containing a green-coloured substance suspected to be ganja or marijuana were found in three trolley bags.All four accused were arrested on Wednesday, and the seized substance along with packing material was taken into custody, officials said.“The total net weight of the seized substance is 8,925 grams, with an estimated value of approximately Rs 8.925 crore,” officials said in the statement, adding that preliminary testing confirmed it to be ganja/marijuana.Officials said the passengers have been booked under the Narcotic Drugs and Psychotropic Substances Act, 1985.