Justin Bieber punches a fan in Barcelona

Justin Bieber has been involved in another incident, only this time it involves a fan.

A video has emerged showing a fan reaching into the open window of Justin’s chauffeur driven car while the vehicle was surrounded by hordes of fans.

The ‘Purpose’ star was en route to Barcelona’s Palau Sant Jordi when a fan reached through the window to touch him. Seconds later, Justin lashed out with a jab that left the boy with a bloodied lip. A group of girls standing in his vicinity appeared to be equally shocked as they notice that he was bleeding. The boy is then seen spitting out blood.