The emergency services are responding to reports of a helicopter crash in south London.
The London Fire Brigade said it had received multiple calls of a helicopter hitting a crane in Vauxhall.
Ex-BBC producer Paul Ferguson said the helicopter “plummeted straight into the ground”. People have reported seeing a pall of smoke in the area.
Police said they first received calls at 08:00 GMT and the London Ambulance Service said it was also at the scene.
Transport for London has confirmed there has been an incident.
Mr Ferguson added: “The building the helicopter hit is shrouded in mist.”
He said the crane at the top of the building was now hanging down the side of the building.