Mancherial: Panic gripped among the passengers of the Duronto Express train after they heard the sounds of gunshots in the moving train. The shocking incident took place in Duronto Express running between Secunderabad and Hazrat Nizamuddin. According to the reports, an argument took place between two army jawans when the train reached Mancherial. The person under the influence of alcohol fired a gun in the air. The alerted Ticket Collector informed the news to railway police. The RPF police took them into custody after the train reached Khagaznagar Railway station. Police interrogating the persons.