By Nathan Salt For Mailonline
Published: 12:15 GMT, 27 February 2020 | Updated: 12:28 GMT, 27 February 2020
A number of Wolves fans clashed with Spanish police in Barcelona ahead of their Europa League second-leg against Espanyol on Thursday.
Footage which emerged on social media showed a group of men, some seen wearing Wolves shirts, confronting police who were holding batons, carrying riot shields and wearing helmets.
In the video, police are seen retreating and one man in a white t-shirt is seen lying on the ground, appearing to be unconscious as other supporters attend to him.
Spanish riot police (left) are seen holding batons during a clash with Wolves fans in Barcelona ahead of the Premier League side's meeting with Espanyol in the Europa League last-32