A helicopter hovering over Manchester for hours left residents with questions yesterday.
Witnesses took to social media to ask fellow Mancunians why a 'blue and yellow' helicopter was 'flying really low' over the city 'all day' on Tuesday.
Some were left feeling unnerved by the 'constant whirr', associating it with an incident, as the aircraft was seen flying close to the ground.
Now the mystery can be solved.
The helicopter was in fact carrying out surveys of the city, flying on a path that extended across the city.
The aircraft visited Irlam, Eccles, and the centre of Manchester. It headed to the other side of Salford and flew over Swinton.
The helicopter also flew over Walkden and Atherton.
The aircraft belongs to PDG Helicopters - a national company running a fleet of helicopters for aerial surveys, aerial cranes, aerial filming and a charter vehicles.
Bosses confirmed to the Manchester Evening News that the aircraft has been flying over Manchester 'for the last few weeks' carrying out surveys, though they could not confirm the purpose of the surveys.
The news will come as a relief to residents in Manchester.
One social media user who spotted the helicopter said: "It's really damn low - never seen a helicopter circling that close to the ground before.
"There's just something really alarming about the constant whirr of a low flying helicopter. I always assume something awful has happened."
In recent months, a number of helicopters have been flying over Manchester for a variety of reasons, including National Grid patrols inspecting power lines.
Military helicopters have also been seen in the area earlier this month carrying out training exercises ahead of a deployment to Afghanistan.
