Thousands of people once again hit Delhi streets on Friday protesting against the contentious Citizenship Amendment Act (CAA) throughout the day but one in Old Delhi turned violent in the evening with a car set ablaze outside a police station and pelting of stones by that security personnel described as "outsiders". Here are a few questions that have been raised by News Nation. How did the violence start? Who was behind the violence? From where do the protesters got stones to pelt on police personnel? Take a look at full report.