New Delhi, Oct. 27 -- An Indian national has been arrested at Delhi's Indira Gandhi International (IGI) airport for trying to smuggle in gold worth Rs.18 lakh in the cap of a plastic water bottle, customs department officials said on Sunday. The incident occurred on Saturday when the passenger arrived at Terminal-3 via Air India flight AI-996 from Dubai. Based on a tip-off, customs said, an official discreetly followed him from the flight gate before being stopped at the exit of the green channel. "During an X-ray of his baggage, officers noticed suspicious images and decided to examine his belongings further," said a customs official. Upon carrying out a detailed inspection, officials found that the plastic cap of a beverage bottle had been tampered with. Inside it was a small cylindrical piece of gold, crafted to fit snugly within the cap, in an attempt to make it difficult to detect. htc...