At approximately the same time, a second window on the building's first floor, on the western side was broken when protesters threw a metal barricade into it.

The road has been blocked off since his election and this week additional concrete barriers and metal barricades were put in place.

They were confronted by masked protesters using metal barricades, traffic cones, rubbish bins, umbrellas and plastic tape to slow down their enemy.

The area was quiet yesterday, although debris from hours earlier was everywhere: upturned metal barricades, discarded helmets and umbrellas, placards and broken glass.

As the day draws on, some grow weary of waiting and start kicking and hammering on the metal barricades.