A helicopter has crashed in central London.
Emergency services were called to the scene, near the River Thames at Vauxhall, after reports that the aircraft had hit a crane and cartwheeled before bursting into flames.
A plume of smoke billowed into the sky above the area on Wednesday morning.
Fire and rescue services said they were taking "lots of emergency calls" as eyewitnesses described seeing grey smoke towering into the sky, close to Battersea Bridge, in Vauxhall.
A London Fire Brigade spokesman was unable to give details but said: "We are taking lots of emergency calls at the moment".
A Met police spokesman said: "We had a call at approximately 8am (1900 AEDT) this morning and we are dealing with an incident.
"We are still waiting for some further details at the moment."
Eyewitnesses took to Twitter to report details.
One said the helicopter appeared to have hit a crane.
Another said it crashed close to a railway line.
One user posted a dramatic photograph showing burning wreckage in the road.