Arsenal supporters found themselves caught up in trouble outside the Metropolitano Stadium, as police deployed tear gas in the vicinity ahead of the Champions League encounter. One eyewitness said that it was Atletico fans – all dressed in black – clashed with local police which sparked trouble outside the ground more than an hour before kick-off.
Arsenal supporters were subsequently caught up in the unrest as police used tear gas, leaving a distinctive smell lingering near the stadium. Some supporters took to social media claiming plastic bullets had been fired, though this remains unconfirmed. Fans were compelled to cover their mouths with scarves as they made their way towards the ground.
