Eyewitness states: I was standing on 31th floor of building and look on sky above and i saw this. Its very far above from 31th floor i dnt think its a drone. Its in a city where there are none of military bases. I was waiting it to come down if it was a drone but at the end it keeps going up in the sky and disappear in the cloud. Can you check whether it is ufo or not? Thanks you.