The fire investigation is completed but investigations by the State Department of Environmental Conservation and Suffolk County health department will continue, the Riverhead fire marshal says.

The recycling plant was destroyed after the main building, considered a recycling transfer facility of Crown Recycling, caught fire. The call came in at around 2 a.m. Wednesday.

Around 250 firefighters battled a raging Nassau County recycling plant fire Wednesday morning.. The blaze began shortly after 2 a.m. at the Crown Recycling Facility in Calverton, according to News ...

The Crown Recycling Facility on Youngs Avenue in Calverton was heavily damaged in an early morning fire on Wednesday. Credit: /Tom Lambui.

Riverhead Fire Chief Piotr Kurzyna said a call came in around 2 a.m. about a fire at Crown Recycling. Upon arrival, firefighters found all four of the center’s buildings engulfed in flames.

No one at Crown Recycling could be immediately reached for comment. "They have a permit to transport asbestos, but it's our understanding that no asbestos was on site," Ryan McGarry of the DEC said.