Essex Police has issued a statement. The force said officers remain at the scene of a "serious incident" at Southend Airport.
It added that police were alerted shortly before 4pm to reports of a collision involving a 12-metre plane.
The statement continued: "We are working with all emergency services at the scene now and that work will be ongoing for several hours.
"We would please ask the public to avoid this area where possible while this work continues."
The force said that as a precaution due to their proximity to the incident, Rochford Hundred Golf Club and Westcliff Rugby Club were being evacuated.
