UWCHLAN TOWNSHIP, Pa. (CBS) — Crews are dealing with a hazmat situation at a building in Uwchlan Township, Chester County on Wednesday afternoon.

Authorities say first responders were dispatched to 75 East Uwchlan Avenue for an exposure of potassium cyanide.

Crews are on the scene assessing the workers for exposure.

The coroner is also on scene.

Stay with CBSPhilly.com for this developing story.

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