Officials say Interstate 495 north in Andover has been shut down until further notice due to a chemical fire that broke out inside a truck on Monday afternoon.
A state police hazardous materials team and the Andover Fire Department responded to the scene, as the fire continued to burn.
Andover Police Chief Michael Mansfield said there have been several small explosions caused by continuing reactions, and the fire was extinguished shortly before 5:30 p.m.
The nature of the chemicals was not immediately released. All lanes on the northbound side are closed "indefinitely", according to state police. The hazmat team is monitoring the area by air to prevent any risk to residents and motorists in the area.
The incident occurred at 12:20 p.m.
There is no estimated time for the reopening of the northbound side. The fire was still going on as of 3 p.m. but the fire was put out about 5:30 p.m., according to Mass.
"All traffic on I-495 northbound is being diverted onto I-93 northbound at Exit 40B". Drivers trying to continue on 495 will be able to exit 93 at exit 48 to rejoin via Route 213. "Those drivers that must travel through the affected area should expect delays, reduce speed and use caution".
A state police spokesman said authorities had not yet identified the chemicals involved in the fire.
It was the second tractor-trailer fire on 495 today. The material did not spill out of the tractor trailer.
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