Mysterious Samurai Helps Police

A samurai sword wielding vigilante came to the rescue of two police officers that were attacked by an armed gang in South Shields, England. If I didn't know any better, I'd say that this was the work of Hiro Nakamura, from the television show Heroes. A more likely explanation is that small local gangs in England have taken to stabbing each other with samurai swords just to keep things interesting. However, why a gang member would aide police is still a mystery. Maybe it was a ninja.