At least 100,000 people have converged in Belgrade for a massive rally in the Serbian capital seen as a culmination of months-long protests against populist President Aleksandar Vucic.

Slovakian Prime Minister Robert Fico was gravely injured in an apparent assassination attempt that rocked the small country and the rest of Europe just weeks before an election.

When a 13-year-old boy last week opened fire on his fellow students in a school in Belgrade, and a day later a man killed people at random in villages south of the Serbian capital, the country came to a standstill.