UFO Spotted by Multiple Witnesses in Oahu Hawaii Video Residents of the Hawaiian island of Oahu were left baffled last week as a mysterious blue object streaked across the evening sky before crashing into the ocean. A number of witnesses called 911 - USA's emergency phone number - to report sightings of the unidentified flying object on Tuesday, according to Hawaii News Now.  Photos and videos that are being circulated online show the glowing blue object moving across the sky.