SPECULATION is rife over what caused a mystery 'sonic boom' that shook Somerset yesterday (Saturday).

At around 2.45pm a massive bang was heard across the county and in Dorset - with reports of it being heard as far as Normandy in France.

The sound reverberated for several minutes and shook homes, rattling windows and setting off car alarms.

But what was the cause?

Early suggestions on social media included military planes flying overhead.

But the Ministry of Defence has said it was not responsible.

A person in Jersey has dashcam footage of what they claim is a meteor in the sky over the island.

So far, there has been no confirmation of the cause by official sources, despite widespread reports of the incident in national news and on social media.

The British Geological Survey has said a "probable sonic event" took place today in Dorset, Somerset and Devon.

Police say they have had no reports of noises related to the bang.