WOBURN, MASS. (WHDH) - Three people were taken to the hospital following a hazardous materials incident involving a mixture of cleaning chemicals at a Red Robin restaurant in Woburn on Tuesday night, officials said.

Emergency crews responding to a reported hazmat situation at the Washington Street restaurant evacuated the building, according to the Woburn Fire Department.

Woburn Fire Chief Stephen Adgate said cleaning chemicals were mixed together in the kitchen but officials do not know which materials were mixed.

“The cleaning crew inadvertently mixed two solutions together, we’re not sure if they were the same solutions,” Adgate said. “It’s all under investigation right now.”

Everyone in the restaurant was evacuated and three employees were hospitalized, the chief said. He said their injuries were not considered to be serious.

Firefighters and a Hazmat team entered the building to determine what chemicals have been mixed and then clean up the spill.

No additional information was immediately available.

The general manager at a Buffalo Wild Wings in Burlington died earlier this month after inhaling fumes from a highly acidic detergent that was being mixed to be used as a floor cleaner.

“The fact that it happened a week or two ago in Burlington does heighten the awareness,” Adgate said. “It does make us a little more concerned.”

Those who came to the restaurant now saying they are feeling nervous.

“It’s hard to think something so awful and violent can happen at any time,” one customer said.

Fire crews said they took extra precautions on the scene and that they are fortunate this was not as serious at the incident in Burlington.

This is a developing news story; stay with 7NEWS for updates online and on-air.

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