Emergency services were called to an incident at a house on Drummond Road, Ilkeston, on Saturday evening, with an air ambulance landing nearby in Victoria Park.
The helicopter touched down on the bowling green at approximately 6.49pm, attracting the attention of residents and passers-by.
A number of emergency service vehicles attended the scene, with the response focused on a property on Drummond Road.
The helicopter used the bowling green as a landing site after the nearby cricket ground was unavailable due to a match taking place.
At the time of publication, Derbyshire Police have not released any official information regarding the nature of the incident and no formal statement has been issued.
As a result, we would urge people to treat information circulating on social media with caution and avoid sharing unconfirmed reports as fact.
Update: This is a developing story. Further information will be added when confirmed by the emergency services.