Two or three people were injured in an explosion at a chemical plant in northern Spain on Thursday, according to euronews.
Authorities advised residents of several small towns near Barcelona to stay indoors as a large toxic orange cloud spread over the area. Firefighters said some 65,000 residents of Igualada and four nearby towns were to stay indoors until the cloud dissipated, according to The Mirror.
The regional government of Catalonia said in a statement that the blast appeared to have been caused by two chemicals coming into contact during delivery to the plant, owned by Spanish company Simar. According to The Mirror, the chemicals were reportedly nitric acid and ferric chloride.
The company Simar could not immediately be reached for comment.