By Tatyana Kekic in Belgrade Tens of thousands of people gathered in the southern Serbian city of Niš on March 1 to mark the fourth month since a deadly railway station disaster, in what has become the largest and most significant challenge to President Aleksandar Vucic’s decade-long rule.

Vucic’s government has said it will launch an anti-corruption campaign, and has denied allegations of corruption.

In the four months since 15 people were killed when a roof collapsed at a newly-renovated train station in Serbia’s second-biggest city of Novi Sad, mass demonstrations have gathered momentum

Tens of thousands of people on Saturday joined protesting students in Serbia, at a rally proclaiming they will no longer accept injustice and corruption.