From LA Times.com
http://latimesblogs.latimes.com/lano...mass-ride.html

"...seized more than 20 bicycles for various offenses, including riding unlicensed bikes..."

"...Riders thought police were there to help move traffic along, but instead cyclists were cited and their bicycles impounded. About 60 citations were handed out to riders without proper night lighting, for running stop signs or riding unlicensed bicycles, among other violations..."

"...Of the bikes seized, 11 did not have brakes, Zapalski said. To lawfully ride a bike on city streets, bicyclists must register their bikes with the city and have it inspected by the Fire Department..."