An arson warning note found on the 1st in a train on Busan Metro Line 2. Provided by Busan Transportation Corporation A man in his 50s who left an ‘arson warning’ note on the Busan Urban Railway was arrested by the police a day after the crime. It was found that this man was dissatisfied with the slow departure of the train from a specific station. On the 1st, the Busan Haeundae Police Station urgently arrested Mr. A (in his 50s) on charges of posting an arson warning note on a train on Busan Metro Line 2 (public intimidation).