BBC News TV reports show fires have been burning in parts of London after a third day of violence and looting on the city’s streets.
Shops were looted and buildings set alight as police clashed with youths. The trouble also spread to Birmingham, Liverpool, Manchester and Bristol.
Violence first flared on Saturday after a peaceful protest in Tottenham over the fatal shooting of a man by police.
At least 225 people have been arrested and 36 charged following the riots across London over the past three days, Scotland Yard said.
It added that an extra 1,700 officers had been deployed across the capital on Monday night. Nine police forces from other parts of the country were assisting in providing support, as well as the City of London Police and British Transport Police.
Commander Christine Jones, from the Met, said: “The violence we have seen is simply inexcusable.
“Ordinary people have had their lives turned upside down by this mindless thuggery. The Met will ensure that those responsible will face the consequences of their actions and be arrested.”