Up to 400 police have been in action this week in the latest crackdown on gangs set to target the London 2012 Games, Scotland Yard said.
Several arrests have been made as part of the wide-ranging Operation Ursus campaign aimed at disrupting and breaking down gangs headed for the Games.
These include ten people who were arrested for illegal gaming offences.
Another offence led to two people being arrested and £14,000 seized, while mobile phones and a large amount of counterfeit money was recovered this morning.
At another location leading to eight people being detained.
Marcus Powell reports