Rapid Action Battalion (RAB) arrested a youth named SA Nahid Happy from FDC gate area in Tejgaon in the city on Monday in connection with threatening Dhaka North City Corporation (DNCC) mayor Annisul Huq.Commander Mufti Mahmud Khan, director of the legal and media wing of the Rapid Action Battalion (RAB) said to Jago News, Dhaka North City Corporation (DNCC) Mayor Annisul Huq received a threat through his mobile phone on July 14. A General Diary was registered with Gulshan police station on Monday.Following the GD, a team of Rab-2 started investigation into the matter and arrested Happy from near FDC gate at about 4:40 pm, he added.