OMG! Those horrible sky noises are back, this time in Slovakia. And they are very scary!

The roaring noises were reported in various districts of Bratislava last night, similar to a cry of a mysterious and huge animal.

The sounds lasted for several minutes and their intensity frightened people in Ružinova, Trnavka, Petrzalka or New Town.

These videos of the spooky sounds appeared on the internet this morning. What causes these mysterious sounds which are referred to on the planet?