A YouTube video indicates that an Israeli-made "kamikaze drone" [http://www.c4isrnet.com/story/military-tech/omr/missile-defense/2015/08/13/kamikaze-drones-add-new-layer-lethality-remote-forces/31405521/] has been used by Azerbaijan against Armenian forces in the conflict over the disputed territory of Nagorno-Karabakh, according to the Washington Post[https://www.washingtonpost.com/news/checkpoint/wp/2016/04/05/israeli-made-kamikaze-drone-spotted-in-nagorno-karabakh-conflict/.
The video[https://www.youtube.com/watch?v=YmHCQg5sveA] appears to show a UAV with the distinctive shape of the Israel Aerospace Industries Harop, a loitering munition that is essentially UAV designed to directly strike a target like a missile. Armenian spokesmen told Russian media that the weapon hit a bus filled with Armenian volunteers, killing seven.
In the video, the Harop is seen diving toward the ground before it disappears behind a hill, followed by a loud explosion.