BOSTON (CBS) – Fire officials say a person trying to make fish oil supplements was behind a hazmat incident that forced the evacuation of buildings in Boston’s Fenway neighborhood Tuesday night.

Emergency crews and the FBI Joint Terrorism Task Force responded to Fenway Market on Kilmarnock Street after receiving an anonymous tip.

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Mass. Department of Environmental Protection at the scene of a hazmat incident in Boston (Photo from Julie Loncich/WBZ)

Mass. Department of Environmental Protection at the scene of a hazmat incident in Boston (Photo from Julie Loncich/WBZ)

On Wednesday, a spokesman for the Boston Fire Department said a store owner was apparently letting a friend experiment with making fish oil supplements. Large bags of yeast, omega 3 acids and 55-gallon barrels of hydrogen chloride were found in the basement.

The basement area was messy and it took crews a while to make sense of the materials inside, officials said.

A look inside the Fenway Fish Oil lab (Courtesy: Inspectional Services Dept.)

A look inside the Fenway fish oil lab fashioned in a store basement. (Courtesy: Inspectional Services Dept.)

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“In one corner there are stacks of soda and things for sale for the convenience store,” Boston Fire spokesman Steve MacDonald said. “In the other corner there were 500-gallon drums, workbenches with all sorts of things on them.”

A look inside the Fish Oil lab in a Fenway basement. (Courtesy: Inspectional Services Dept.)

The messy Fenway store basement. (Courtesy: Inspectional Services Dept.)

Authorities said it doesn’t appear there was any criminal intent, but the fire department said those cooking oils didn’t belong in the basement of a Fenway business.

Crews were expected to remove the chemicals throughout the day on Wednesday.

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WBZ NewsRadio 1030’s Karen Twomey reports: