The message from the Met Police came loud and clear - and very early in the morning. Hundreds of officers making over 100 arrests in dawn raids aimed at keeping trouble away from this weekend's Notting Hill Carnival.
Officers targeted suspected gangs, seizing cash and weapons. But today's high visibility raids were just one part of the operation -- police are keeping a close eye at what's going on online too, as Piers Hopkirk reports.
More top news
The friends of a Czech businessman who was beaten to death raise £10,000 in a day to send body of 'great man with a big heart' back home
A man has been 'viciously' beaten up in fight outside pub in west London, Scotland Yard said.
Scotland Yard say they have identified the driver of lorry which killed a 71-year-old man outside the busy Earl's Court Tube station.