The fallen drones, which were later located at the Taichung City Hou-Zong Senior High School, did not cause any injuries, the administration said. The administration suspects that the interference was caused by other drones flying in the area, Liao said. It was also possible that some people were using other radio-frequency devices near the venue, which caused interference, he said. Strong winds might also have caused the drones to collide and crash, they said. Taichung only allows a limited number of fly zones for drone operators, which they said was unreasonable.
Source: Taipei Times February 23, 2020 15:56 UTC