( CNN ) A medical helicopter crashed into the parking lot of a St. Louis hospital , killing the pilot . The helicopter went down late Friday in the parking lot on the campus of St. Louis University Hospital , spokeswoman Laura Keller said . The St. Louis Fire Department said on Twitter that it responded to a helicopter accident and a subsequent fire that had been extinguished . Pictures from the scene showed charred smoky remains as authorities combed through the accident site . No patients , employees or hospital visitors were affected , Keller said . The St. Louis Fire Department confirmed the pilot was the only fatality . The pilot 's identity has not been released . No other information was immediately available . The National Transportation Safety Board is investigating , according to the hospital spokeswoman .
The helicopter went down late Friday . St. Louis University Hospital is investigating .