Fuji FA-200-160 Aero Subaru crashed close to Mostar LQMO in Bosnia Herzegovina during panoramic flight.
This is rare article I found in English:
https://www.usnews.com/news/world/articles/2017-05-13/light-aircraft-crashes-in-bosnia-five-dead-police
Not many details are known, some rumors mention pilot’s helth issues, some aircraft condition, nothing reliable.
It seems it was this aircraft:
http://www.planecheck.com?ent=da&id=31707
It had been advertised by pilot who got killed.