A teenager from Glasgow has been arrested after a message was posted on Facebook allegedly inciting others to commit acts of disorder.

The 16-year-old was detained during an operation in the city's south side at 12:40 on Monday.

It comes after rioting and looting in London at the weekend spread to other English cities.

Police said they were monitoring social networking sites closely and would take "decisive action" to prevent violence.

The teenager was expected to appear at Glasgow Sheriff Court on Wednesday.

The Strathclyde force said there was no intelligence "at this time" to suggest that there was any trouble planned.

Earlier, the Association of Chief Police Officers in Scotland confirmed that forces here were on standby to help colleagues in England if requested.

There have been three nights of violence in London since a 29-year-old man was shot dead in Tottenham by police on Saturday.

A peaceful protest over the death of Mark Duggan was followed by violence which spread to other parts of the city on Sunday.

A third night of unrest saw violence spread outside London to Birmingham, Liverpool, Nottingham and Bristol.