Residents are part of Peterborough are being told to stay indoors while a controlled explosion takes place on an unstable chemical.
Staff were evacuated from Perkins on Frank Perkins Highway at 1:30am this morning.
A 500metre has been set up around the site and roads are currently closed.
Police say The chemical does not pose a risk to nearby residents, however people are being advised to stay indoors as a precaution.
More top news
Rain moving east, sunshine and showers Thursday.
Rain overnight, heavy in places.
The oldest trophy in English football has travelled to Alvechurch Football Club, ahead of the team's match against Hanley Town this weekend.