The white objects were caught on camera moving slowly across the sky in Penang, Malaysia, on Monday afternoon.Stunned crowds gathered below as they cried out to each other asking what the objects could be. The crafts hovered slowly above a 65-storey skyscraper then carried on flying until they disappeared out of sight. Onlooker Wang Soon Yu, 43, posted the mobile phone clips online and they went viral with more than half-a-million views. He said: ''Nobody knows what they are, but they're definitely not aeroplanes. Aircraft fly a lot faster than this.