Emergency crews responded to a fire at a recycling plant in Neville Township.
Allegheny County dispatchers said the fire started at around 8:41 p.m. on Saturday.
The fire was burning at Metalico Pittsburgh on Grand Avenue until around 11 p.m.
Channel 11 observed firefighters pouring water onto a large stack of crushed vehicles.
Cranes were also being used to move scrap around the scene as crews fight the flames.
Investigators say there are no injuries.
The Allegheny County Health Department is gathering information from the company and other partner agencies, officials said.
The ACHD’s Avalon air quality monitor showed that during the time of the fire, PM2.5 levels didn’t exceed the ‘moderate’ range, according to officials.