On this day of protest, Belgrade is a powder keg, but just as important is how the president reacts – now and tomorrow | Brent Sadler

Amid anger over dysfunctional politics and alleged corruption, Aleksandar Vui faces a harsh spotlight, inside and outside Serbia

From the streets of Belgrade, the cracks in President Aleksandar Vui's near-decade-long authoritarian grip on power have become impossible to ignore. After more than four months of largely peaceful student-led protests, frustration with the regime appears to have reached breaking point.

The country is gearing up for a massive anti-government protest today, as thousands of students and citizens prepare to rally against the Serbian administration. Many residents describe the capital as feeling under siege", with the authorities implementing extreme measures that critics argue are designed to intimidate and prevent people from attending the demonstration.