Harris County Sheriff investigators say two men, believed to be betwen the ages of 18 and 25 years old, sprayed some type of chemical in the air for some unknown reason inside the store just before 9pm.
More than 100 customers and employees were forced to evacuate. Customers say the affects were strong, causing coughing, sneezing and in some cases, even worse.
"Immediately I noticed something was going on and I looked around to all the ends of Walmart and everyone was coughing, sneezing, and some were even throwing up," said customer Oluwatoyin Iseyemi. "So we quickly left the building."
"HazMat came on scene and they went inside and cleared the building," Sgt. Billy Johnson with the Harris County Sheriff's Office said. "They checked the air quality and reported the air quality had returned back to good."
Sheriff's deputies say four to five people had to be transported to the hospital for their symptoms. There is no word on their conditions at this time.
Authorities are using surveillance video to try to identify the suspects.
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