Drones are becoming a headache

Airline safety threatened - and even some residents on ground were struck

Police in Chengdu, Sichuan province, called for people to report illegal drones whenever they spot one flying in the clearance protection zone of the city's airport.

An announcement by the city's public security bureau on Monday encourages people to report at any time around the clock, and pledges to hold those flying drones illegally to account.