A Dunedin student received a "spooky'' surprise when he took a closer look at a pair of photos he took of the Otago Harbour.
Terence Huang (25), originally from China, and two friends took the photos from the jetty at Glenfalloch late on Monday.
Mr Huang said he sat his camera on a chair to steady the shot, but paid little attention to the sky while the camera snapped about 20 photos.
It was not until yesterday morning, when he uploaded the images to his laptop, that he spotted two mysterious objects in two of the shots.
"I had a brief look at the photos last night, but it was late and cold so we went home.''
Rebecca Peng, who was with Mr Huang, said she had taken photos at the same spot before, but had "never seen anything like that''.