French police are thought to have clashed with Paris Saint-Germain fans ahead of their Champions League second-leg semi-final against Arsenal on Wednesday evening.
Security has been beefed up in the French capital ahead of the meeting, with 2,000 police officers on duty in a plan 'tailored to the event'.
But home fans are believed to have encountered trouble in the build-up to kick-off, with the Sun reporting that police have used tear gas on the Parc des Princes faithful.
Videos have been circulating on social media of PSG fans tangling with police officers, with riot police keen to push back supporters and break up large crowds.