Footage has emerged from Barcelona of a mob confronting two people on a motorbike holding the Catalan flag of independence.

The video, captured on Tuesday (October 3), shows a crowd waving the Spanish flag and official Catalan flags marching towards the two people on a motorbike, which speeds past the crowd.

''I heard screams out in the street so I went to see what was happening,'' the filmer later wrote online.

''I saw a group of people with Spanish and (official) Catalonian flags screaming and in the middle of them a motorbike with two people holding Catalonia's independence flag.''

''At that moment some people in the group tried to hit the motorists but others stopped them,'' he added.