It was hard to miss the huge helicopter flying low over Sheffield yesterday evening.
Residents in a number of areas across Sheffield took to Facebook on Tuesday at around 6pm to report seeing, and hearing, a low-flying helicopter.
Many reported hearing a sudden 'terrific' noise before spotting the helicopter overhead.
One eye-witness said that he believed it to be a Black Hawk, an U.S Army utility helicopter with modified versions developed for the U.S Navy, Air Force and Coast Guard.
Now, more than 4,000 Black Hawks are in service with 29 countries, including 2,135 in the US alone.
Residents in Totley, Dronfield and Crookes all reported hearing the helicopter.
One witness said: "I heard it fly over our house - the loudness was startling - sounded as if it was landing - but by the time I rushed to the window it had gone."
Still, there doesn't seem to be any apparent reason, as of yet, for the helicopter's presence in Sheffield.
Apache helicopters have been spotted above Sheffield on a number of occasions.
The helicopters are usually used with military training teams with the aircrafts based at RAF Odiham in Hampsire, home of the UK Chinook Force.
In September, people across Sheffield reported numerous sightings of large, military helicopters flying above the city.
The Boeing CH-47 Chinook is an American twin-engine helicopter which has been in service since 1962 and is operated by armed forces around the world.
The RAF uses the Chinook for trooping, resupply, and battlefield Casualty Evacuation (CASEVAC), and for carrying internal and/or underslung loads.
They can carry up to 55 troops (more, usually 24 to 40) and/or up to 10 tonnes of freight. A secondary role includes Search and Rescue.