A chemical fire broke out in a tractor-trailer as it traveled north on Interstate 495 in Andover Monday afternoon, causing delays as lanes were closed to deal with the incident, State Police said.
Teams from the State Police Department, including the hazardous materials crew and the bomb squad, are on scene with Andover firefighters attempting to suppress the blaze, State Police spokesman Dave Procopio said.
“This is a tractor trailer hauling some sort of tank containing some sort of chemical product,’’ Procopio said.
The chemicals the truck was carrying interacted and combusted, Procopio said. State Police are investigating how that occurred.