A private airlines carrier made an emergency landing at the Netaji Subash Chandra Bose International Airport in Kolkata this morning. According to official sources, the aircraft made the emergency landing following detection of an unclaimed birefcase inside the aircraft. The security officials of the airport are now searching all the passengers and their belongings. They have detained two passengers of the aircraft for interrogation. The private airliner was going to Chennai from Delhi with 123 passengers on board. <br/>