Son'a drone
From Memory Alpha, the free Star Trek reference.
Son'a drones were small automated flying devices used by the Son'a, capable of shooting isolinear tags. These probes were capable to pursuing moving humanoids, targetting them and firing dart-like tags onto them.
In 2375, two Son'a shuttles launched several dozen drones on the Ba'ku planet when their transporters were unable to lock on to the escaping Ba'ku and Starfleet personnel. At least 14 drones were destroyed in the pursuit. (Star Trek: Insurrection)
