People in Dorset in South-West England have been left puzzled following a hailstorm that rained mysterious blue jelly-like balls from the sky.

According to a report by the BBC, the strange jelly balls, having a diameter of around 3 cm each, came raining down after a hailstorm on Thursday afternoon.

The balls were reportedly spotted by a resident named Steve Hornsby who collected the balls in a jam jar.

"[They're] difficult to pick up, I had to get a spoon and flick them into a jam jar," Hornsby told the broadcaster. He further mentioned that the sky was dark yellow in colour that afternoon following which there was an instant hailstorm. As he walked across his garden, he found strange blue spheres scattered across his garden.

The strange phenomenon mystified onlookers and numerous theories and speculations were made regarding the nature and constituents of the jelly-like balls.

However, the Met Office confirmed that the substance was "not meteorological".

On the other hand, as per reports, a research assistant at Bournemouth University speculated that they might be "marine invertebrate eggs".

"These have been implicated in previous 'strange goo' incidents. I'd have thought it's a little early for spawning but I suppose we've had a very mild winter. The transmission of eggs on birds' feet is well documented and I guess if a bird was caught out in a storm this could be the cause," the BBC quoted Josie Pegg at Bournemouth University as saying.

Take a look at the video below to know more about the strange phenomenon: