Lights in the Sky - Austria

I do not remember the exact date, when this was posted in a austrian forum some years ago.
The man who took these unusual photos said, he just wanted to test his new camera equipment outside when he recognized this lights who vanished as quick as they show up.
Howewer, this could be a Hoax, but who really knows ? If true, these photos show something i never came across in Ufo History. Could be something like Bluebeam, or a real message from another intelligence.
Make your choice...