Screenshot of the drones out of control in SW China's Chongqing Municipality. Photo: Sina Weibo

About 100 drones lost control and crashed into a building during a show in Southwest China's Chongqing Municipality on Monday night. 

According to a video and photos circulated on the internet, a large group of drones with flashing blue lights displayed abnormal actions during the performance. 

They moved slowly toward a building, with some crashing into it and others directly dropping from the air to the ground and falling into the river. Several people screamed that they could not control the drones.

A person familiar with the matter later disclosed that a crash in the mainframe control led to the incident, in which up to 100 drones lost control and malfunctioned. Although there were no injuries, the incident resulted in huge economic losses for the show designers. 

Global Times