Violence in West Bengal: Here is the video tweeted by BJP

BJP and TMC supporters on Tuesday fought pitched battles on the streets of Kolkata during a massive roadshow by BJP chief Amit Shah, who escaped unhurt but was forced to cut short the jamboree and had to be escorted to safety by police. While Shah called it an attempt to "strangulate democracy". Chief Minister Mamata Banerjee said the violence was triggered by goons the BJP brought from outside Bengal.