WATCH: Massive blaze sweeps through chemical plant in New Jersey

One of the two chemical facilities engulfed in flames reportedly produces chlorine

A large fire broke out at a chemical plant in Passaic, New Jersey, with nearby residents urged to stay inside with their windows closed. One of the facilities burning reportedly has a major chlorine stockpile.

Despite warnings for local residents to stay inside, a large crowd of people – including young children – could be seen outside observing the flames.

Large fire at a chemical plant in Passaic New Jersey. The mayor is asking nearby residence to keep their windows closed. @CBSNewYork pic.twitter.com/mLVrSjdwql