Fire officers have contained the leak of hydrochloric acid at a chemical plant at Trafford Park, Manchester, police said.
Superintendent Chris Ullah from Greater Manchester Police said:
Emergency services have been working at the chemical plant at Trafford Park this evening and have isolated the leak.
There are no reports of injuries or any people requiring medical attention.
We are now starting to scale down the emergency service response and return normality to the area as quickly as possible.
The cause of the leak is not yet known but will be investigated once the building is safe.
More top news
Nick Boles warned the PM it was "time to raise your game" and claimed her government "constantly disappoints" in a tweet.
The Foreign Office warned holidaymakers that "intensive law enforcement activities" were expected in Montego Bay.
The man who sold himself to the American people as the greatest deal maker in history is now overseeing paralysis.