The following video is brought to you courtesy of the Sky News YouTube Channel. Click the video below to watch it now.
Sky News witnessed separate incidents where crowds gathered after officers stopped black teenagers.
There were accusations the teenagers had only been stopped because of the colour of their skin. The Met Police refute any such suggestion.
SUBSCRIBE to our YouTube channel for more videos: http://www.youtube.com/skynews
Follow us on Twitter: https://twitter.com/skynews and https://twitter.com/skynewsbreak
Like us on Facebook: https://www.facebook.com/skynews
For more content go to http://news.sky.com and download our apps:
Sky News videos are now available in Spanish here/Los video de Sky News están disponibles en español aquí https://www.youtube.com/channel/UCzG5BnqHO8oNlrPDW9CYJog”