Two dozen people, many of them students, became ill during a high school football game after being exposed to an unknown substance.
The Houston Fire Department sent hazmat crews to Barnett Stadium in southeast Houston Friday after several Austin High band members became ill during a game against Yates.
A Houston school district spokesman told the Houston Chronicle that symptoms included severe nausea, dizziness and vomiting.
Herbert Griffin, an assistant fire chief, said whatever students were exposed to came from the concessions area, and no one was hospitalized.
Griffin did not immediately return a phone call from The Associated Press late Friday.