Otpor's first significant gathering took place on Saturday, 14 November at the University of Belgrade Faculty of Electrical Engineering – over a thousand students marched across town to the Faculty of Philology where a number of students were under lockdown inside the building as the authorities wanted to prevent them from joining the protest. Otpor leader Srđa Popović (also a member of the Democratic Party) was arrested that day and then released on intervention from Amnesty International after being detained for 8 hours. By late November, Otpor ideas reached Novi Sad, Serbia's second city, with the first graffiti appearing on buildings in the city.