This is the astonishing moment an inflatable Nemo fish seemingly came to life - opening a door by itself and escaping.

CCTV footage shows the helium-filled clownfish balloon hovering in the air inside a store in Sacheon, South Korea, on January 23.

It can be seen moving stealthily towards the entrance. Moments later, the glass door suddenly opened on its own, causing the inflatable to float outside the shop.

In another clip from outside the building, the balloon resembling the iconic cartoon fish, Nemo, is seen flying up in the air, blown by strong winds.

The shocked store owner is yet to find the Nemo balloon. He said the bizarre - and slightly creepy incident - was caused by the balloon triggering the door's automatic sensor.

He said: 'The balloon from the opening ceremony triggered the automatic door and escaped. I will reward anyone who can find it.'