Montville — More than a dozen fire departments converged early Friday in an attempt to contain a blaze at a scrap yard in Uncasville.

The fire, at Connecticut Scrap at 33 Pequot Road, was first reported shortly after 1 a.m. Friday and fire crews spent the night dousing the fire with water from aerial trucks around the perimeter of the scrap yard. Several explosions could be heard early on in the fire.

Montville Fire Marshal William Bundy said crews were expected to remain at the scene much of the morning. The state Department of Energy and Environmental Protection was called to the scene to monitor air quality and water runoff from the site. Bundy said initial tests of both the air and water revealed the air quality was within acceptable levels and there was no visible contaminants in the runoff. As a precaution, people were asked to steer clear of the area.

The scrap yard is full of vehicles, scrap metal, tires and other debris. Bundy said the bulk of the fire was knocked down as of 8:30 a.m., but did not immediately know the full extent of the damage.

Bundy said 15 agencies were called in as mutual aid to help with the fire, many using tanker trucks to haul water to the scene and supplement the existing fire hydrant system.

No injuries had been reported and the cause of the fire was not immediately available. Bundy said he had called in the state Fire and Explosion Investigation Unit to aid in the investigation into the cause and origin of the fire.