IDF uses drone to drop tear gas

https://www.cnn.com/videos/world/2018/05/14/jerusalem-protest-teargas-lee.cnn

Previously the Palestinians shot a drone from the sky with slinghots.

Here's bellingcat's view
https://www.bellingcat.com/news/mena/2018/06/18/first-isis-iraq-now-israel-idf-use-commercial-drones/