O'FALLON, Mo. — Police say a drone helped officers locate three juveniles who had been throwing candy from the Sonderen Street overpass onto Interstate 70.

A motorist contacted 911 after something struck her windshield. Officers said a nearby drone launched within about 30 seconds, located the three youths on the overpass and recorded one of them dropping objects toward traffic.

The juveniles later told officers they had thrown candy. No damage or injuries were reported, and the three were released to their parents without charges, according to a police spokesperson. The incident occurred several weeks before police released video October 29.

Police emphasized that even small objects dropped onto an interstate can startle a driver and cause a collision at highway speed. The department says it uses its drone system frequently to improve response times.