Crews of Oakland teenagers carried out brazen robberies this May and fueled violent crime in the city, according to investigators. Oakland Interim Police Chief Darren Allison said, “We’ve seen a surge in violence. Two weeks ago, our city experienced 100 robberies in one week, 50 of which occurred in 72 hours over a weekend. Some of the robberies included car-jackings, shootings, and other assaults. A trend we are seeing with robberies has been an increase involvement of minors."