Serbia's striking university students on Monday launched a 24-hour blockade of a key traffic intersection in the capital, Belgrade, stepping up pressure on the populist authorities over a deadly canopy collapse in November that killed 15 people.

Striking university students blocked one of the most important roads in Belgrade for 24 hours. This footage illustrates a column of car drivers on the highway, passing under the blocked road, honking their horns in support of the blockade by students and citizens.