Four people have been taken to hospital and scores more have been injured at a Christmas lights switch-on in Birmingham. As X-Factor runners-up JLS took to the stage in Birmingham city centre, a metal barrier penning the crowd in collapsed, leaving 60 people needing treatment, West Midlands Ambulance Service said. The planned concert and lights switch-on were cancelled as paramedics set up a special unit to treat the wounded. According to reports, thousands more than the 5,000 fans expected at the event turned up. JLS were due to perform alongside the Sugababes but the event was hastily cancelled. One woman in her 30s suffered serious injuries to her pelvis, shoulder and leg. Another woman broke her ankle. A teenage boy fractured his wrist, while a girl in her teens suffered injuries to her back and legs. The surge happened at Millennium Point on Jennens Lane at about 1.30pm. A ambulance service spokeswoman said: "The remaining 56 patients suffered minor crush injuries and a range of minor medical complaints. They did not require further hospital treatment and were all discharged by ambulance crews at the scene."