Police have released images of two men they want to speak to, after an altercation at a central London Tube station created mass panic on Friday. Officers want to speak to anyone who was at Oxford Circus Underground station at the time of the evacuation. Sixteen people were treated after they were injured fleeing the station, following reports of gunshots being fired on a Central Line platform. There was no evidence any weapons had been fired, police said. Shoppers were barricaded inside stores on Oxford street and armed police were deployed after the alarm was raised during the evening rush hour on Black Friday.But 16 people were injured as passengers fled from Oxford Circus station, in what witnesses said was "a stampede". One patient was transferred to a major trauma centre for leg injuries, while eight people were taken to central London hospitals for minor injuries.