CHENNAI: Thousands of passengers faced hardship due to delayed services in the Chennai-Arakkonam section after three coaches of an empty suburban train derailed in Avadi on Tuesday morning. All intercity trains operating from Chennai to Coimbatore, Tirupati, and Bengaluru, including the Vande Bharat, Double Decker, Shatabdi, Kovai, Lalbagh, Sapthagiri, Garudadri, Coimbatore intercity, and other express trains experienced delays of two to three hours in both directions.