Twitter warnings at Ottery St Mary barrel roll

Ottery St Mary
Image caption The tar barrel custom is thought to originate from a pagan ritual

Police used Twitter to warn people of any safety problems at a Bonfire Night event in Devon.

Thousands of people were expected at Ottery St Mary for the annual rolling of tar barrels.

Police used a public address system and the Twitter tag #tarbarrels and said people could follow @DC_Police for updates on any safety warnings.

Twelve people were burned in 2009 in a blast thought to have been caused by an aerosol being thrown into a barrel.

The custom of carrying flaming tar barrels through the streets of Ottery St Mary is thought to originate from a pagan ritual aimed at exorcising evil spirits from the town.

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