Google has continued to tease fans of its Google doodle with yet another image of a UFO.

The latest in the, now series, sees the Google logo spelt out in crop circles with a UFO hovering above.

The creation of the doodle also coincided with a tweet - this time what appeared to be long/lat coordinates, however the "51.327629, -0.5616088" reference puts it just outside Woking in the UK.

The link of the doodle goes to a search for crop circles.

The second UFO reference comes just 10 days after the last teaser which showed one of the "O"s being abducted.

At the time Google sent out a cryptic message, again via Twitter with a series of what ,at the time, appeared to be random characters:

"1.12.12 15 1.18.5 20.15 21.19."

However puzzle fans soon worked out that the Google logo was paying homage to the 20th anniversary of 1980s Japanese video game, Zero Wing.

Decoding the numbers by turning them into the corresponding letters of the alphabet, you get: “All your O are belong to us”.

In the game one of the characters says at the beginning - “How are you gentlemen. All your base are belong to us”.

At the time people believed they had solved the riddle. Is this a new riddle or is Google plotting something? Let us know in the comments below.