boomerang-like object flied extremely fast across the sky without any soundFirst sighting occurred around 23:00 pm, we went outside to smoke. It was a clear sky. first we saw a starlike object moving and then disappearing, then we kept looking at sky. I noticed an object coming closer really fast. I told my friends to check that out.It took about 6 seconds to fly from 1 side of the sky to another. It looked like boomerang, had 6 lights, 2 at one "wing", 2 in the middle, 2 at the other "wing". But it was not very clear, it looked a little foggy. it flied right above us, its speed was so fast that it took only like 6 seconds to fly across the sky. with absolutely no sound. i couldnt say what was its height, hard to understand.e went back to room... when finished watching a tv show, then we came out, checked the sky again, about 2 minutes after checking we saw 2 cube like things flying, they made extreme turns and moved like.. ahh its hard to explain in english for me. it was like 1 side of it was real and other was in mirror. they moved very similar.3rd time occurred maybe 3 minutes after last one, then there was, i think, 3 objects (it could be 1 object aswell just maybe the lights under it moved), all looked like cubes and once again moving very close to each other and making those "calculated" moves. it is impossible to explain how did they move by typing it down, all i can say is that all that is known to a civil person about flying objects, that was not one of them, these things are sure unexplained.me, myself always been a skeptic, i still want to believe that they were some kind of secret government aircrafts or something...i hope this information helped u