Groups of youths attacked shops and damaged a police car in north London on Sunday as police sent in reinforcements to prevent more rioting on the scale that laid waste to another area of the British capital 24 hours earlier.
Scattered incidents broke out on Sunday evening in Enfield, a few miles north of the deprived London neighborhood of Tottenham, which was hit by some of the worst riots seen in London for years on Saturday night after a protest over the fatal shooting of a man by armed police a few days earlier turned violent.
Police Commander Christine Jones said the police had "extra resources" on duty across the capital on Sunday.
"Anyone else who thinks they can use the events from last night as an excuse to commit crime will be met by a robust response from us." she said in a statement.
Three shops were damaged, and two of them looted, in Enfield and the rear window of a police car was smashed, police said, adding that several people had been arrested.
Local pharmacist Dipak Shah told the BBC he and his brother had barricaded themselves in their shop after 15 youths smashed the window and tried to break in.
"It was very threatening. It felt as though they could have actually killed or maimed somebody," he said.
A Reuters photographer at the scene said a jeweler's shop window was broken but that riot police had flooded the center of the suburb and youths, who had earlier hurled missiles at police, had dispersed.
Amid rumors there could be more flare-ups on Sunday, police Commander Adrian Hanstock told Reuters there was "a lot of ill-informed and inaccurate speculation on social media sites" that could inflame the situation.
In Tottenham, an area with large numbers of ethnic minorities and high unemployment, workers began cleaning up shops trashed by looters and police sealed off a main street to investigate crime scenes after rioters throwing petrol bombs set fire to police patrol cars, buildings and a double-decker bus.
Politicians and police blamed the violence on criminal thugs but residents attributed it to local tensions and anger over hardship.
Police said 26 officers had been injured as rioters bombarded them with missiles and bottles, looted buildings including banks, shops and council offices, and torched three patrol cars near Tottenham police station.
Residents said they had to flee their homes as mounted police and riot officers on foot charged the crowd to push rioters back.
The Metropolitan Police, which will handle next year's London Olympic Games in what is expected to be Britain's biggest peacetime police operation, faced questions about how the trouble had been allowed to escalate.
The disturbance was finally brought under control on Sunday. Buildings were still smoldering, bricks littered the roads and burglar alarms continued to ring out.
At a nearby retail park, electrical stores and mobile phone shops had been ransacked, with boxes for large plasma TVs discarded outside, along with CDs and glass from smashed windows. "They have taken almost everything," said Saad Kamal, 27, branch manager of retailer JD Sports. "Whatever is left is damaged."
APPEAL FOR CALM
Local MP David Lammy said it was not known if everyone had escaped flats above shops that were gutted by fire. "A community that was already hurting has now had the heart ripped out of it," he told reporters.