Video: Protester tries to put out Olympic flame with fire extinguisher during torch relay in Brazil

A protester has tried to put out the Olympic flame on Wednesday night, interrupting the ceremonial torch relay's leg through Joinville in Brazil.

Wielding a fire extinguisher, the assailant wearing a black vest, shorts and baseball cap, emerged from the assembled crowd and managed to get away one spray of foam before being wrestled under control by one of the police escorts. 

Fortunately, the flame stayed lit and the torchbearer was unharmed. The incident, however, is not the first of its kind and security ahead of the Games in Rio de Janeiro presents a major concern for organisers.