Workers and staff have been evacuated after a floor collapsed at the Jakarta stock exchange. Paramedics are at the scene but it is not clear how many people have been injured in the incident. Police were cordoning off the two-tower, multi-storey building. Images circulating on social media showed a mangled metal structure that had collapsed around a Starbucks cafe near the entrance to the lobby. Jakarta police spokesman Argo Yuwono said hundreds of students were visiting the stock exchange at the time.