ST. LOUIS — Roads were closed outside an industrial plant in Hazelwood Friday afternoon and yellow smoke was seen coming from the smokestacks of the plant.
Pictures on social media showed yellow fumes coming from GKN Aerospace.
Police closed McDonnell Boulevard from Lindbergh Boulevard to Berkeley City limits.
Emergency crews were responding to the scene.
It was unknown if there was a fire or other danger in the plant. Calls to the fire department were not immediately returned.
A GKN Aerospace spokesperson told 5 On Your Side no employees were injured.
The plant is just north of St. Louis Lambert Airport.
GKN Aerospace manufactures electronics and components for aircraft. GKN Aerospace has locations worldwide and bought the St. Louis plant from Boeing. They employ 800 people in Missouri. Its customers at the St. Louis plant include Boeing, Bell Helicopters and Lockheed Martin.
This is a developing story. Check back for details.