I was travelling towards a mall when my wife saw this flying object that had two trail of Yellow lights in an angular shape apart from each other and were kind of hovering over, it sounded bit vibrating and was completely dark in color coz i could only figure out the shape of it which has to be a triangle. IT was huge and around 500-600 ft above m head and was moving quite slow than that of any aircraft i have seen. All this happened around 8 PM in evening. i tried chasing it but could not, two of my friends also saw it while they were standing on roof