EMERGENCY services are dealing with an ongoing incident this evening - with onlookers describing a "massive police cordon" in the area.

A spokesperson for the Yorkshire Ambulance Service said paramedics were called to Marsh Street, in the Marshfield area, but that it is an "ongoing police incident" so could not give any further details.

Police issue statement revealing details of incident 

The air ambulance is understood to have landed in a nearby playing field.

One onlooker told the T&A: "It's a massive police cordon that goes all the way down Hastings Street."

T&A reader Bash Hussain took this video of it leaving the scene.

West Yorkshire Police have been contacted for more details. 

More to follow.