More than 2 hours later, authorities had yet to determine what caused the people to fall ill while at the Market Basket store, the New Hampshire Union Leader reported..
Lt. Tom Redin of Southwestern New Hampshire District Fire Mutual Aid said the market was evacuated and a hazardous material crew from the Keene Fire Department was sent to the store, the newspaper said.
"They're still investigating at the store to figure out what caused this at the time," Redin said.
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