Devon and Cornwall Police watching for riot 'intelligence'
Extra police officers are out in Devon and Cornwall as officers monitor "intelligence" relating to public disorder elsewhere in the UK.
The force said there would be more officers in Plymouth, Exeter, Truro and Torbay overnight following postings on social networking sites.
But it said there had been no major incidents so far.
Twenty-five police officers have travelled to London to assist the Metropolitan Police.
Two football matches in Plymouth and Exeter have also gone ahead.
Plymouth Argyle is playing Milwall at Home Park and Exeter City is playing Yeovil Town at St James' Park.
Ch Supt Steve Swani said: "It is only natural for communities across Devon and Cornwall to be concerned at a time when many are seeing large-scale disorder in other parts of the country.
"I would reassure people that, at this stage, there is no intelligence to suggest any such activity here, but we will be ready to deal with and contain this should it occur."
He said: "We will also be placing as many police officers on patrol across the force as possible to further reassure our communities."
Supt Swani said the force was talking to community and business leaders and local authorities to ensure everyone was aware of the "developing picture".
Mike Jones, general manager at Drake Circus shopping centre in Plymouth, said: "Drake Circus has in place a comprehensive plan which anticipates a wide range of potential incidents, the safety and well-being of customers and staff are paramount to this plan."
Andrew McNeilly, centre manager at the Guildhall Shopping Centre in Exeter, said: "Members of the public can be reassured that the Guildhall Shopping Centre has in place a robust crisis response system to deal with all manner of incidents."