Panic erupted among Christmas shopping crowds on London's Oxford Street on Friday evening as armed officers raced to respond to reports of shots being fired in the area but police said later they had found no evidence of gunfire or casualties. Oxford Street, with its festive window displays and hundreds of overhead lights, was crammed with shoppers taking advantage of the Black Friday sales when the incident happened shortly after dusk. London's Metropolitan Police said in a statement they had found no evidence of gunfire, casualties or any suspects and that the incident, which lasted for just over an hour, had been stood down. "Given the nature of the information received, the Met responded in line with our existing operation as if the incident was terrorism, including the deployment of armed officers," they said in a statement. A Reuters witness said panicked shoppers had fled Oxford Street and Oxford Circus underground station. The witness saw an elderly lady and a man carrying his child knocked over in the rush. "There were people running in all directions. I didn't know which way to run," the witness said. A big thank you for bearing with us whilst we and @metpoliceuk responded to #OxfordCircus. Armed officers were quickly on scene, no evidence of gunfire found. The area was searched swiftly and we are working to lift cordons and reopen stations. \u2014 BTP (@BTP) November 24, 2017 Britain's transport police said they had received a report of one woman suffering a minor injury in the panic. Oxford Circus pic.twitter.com\/VbnZHk1MYc \u2014 Tobi Oke (@TefTobz) November 24, 2017 The capital's transport operator, Transport for London, said Oxford Circus and Bond Street stations, which had been briefly shut due to the incident, had later reopened.