Police seized opium worth ₹10 crore and arrested four persons in connection with it in Assam's Guwahati on Thursday. Officials said the 20503 Dibrugarh-New Delhi Rajdhani Express train was raided based on a tip-off. "The weight of opium is 10.11 kg and market value is approximately ₹10 crore. They were carrying the opium from Dimapur to Howrah," an official said.