A number of people have been injured after a car crashed into security barriers outside the Houses of Parliament, Scotland Yard say. Armed police, ambulances and firefighters are responding to the incident in central London, which happened shortly after 07:30 BST. Officers were seen surrounding the vehicle before a man was arrested. Reports say cyclists were hit but police do not believe anybody is in a life-threatening condition. Scotland Yard cannot say if the incident is related to terrorism at this stage. Westminster tube station is closed and streets around Millbank, Parliament Square and Victoria Tower Gardens have been cordoned off. Members of the public and press have been moved further back from the area as police put up a Terrorism Act cordon, officers at the scene said. Parliament is currently not sitting.