FRISCO (September 16, 2013)--Six people have were burned and suffered other injuries Monday when an oxygen pack exploded as a nurse was treating a high school student.
The nurse was treating the student Monday in the field house at Lone Star High School in the Dallas suburb of Frisco.
As firefighters arrived, the nurse changed oxygen canisters, but the new one exploded, exposing the nurse, another student and firefighters to chemicals.
An assistant principal also was taken to a hospital for treatment.
City officials say in a statement that the fire department's hazardous-materials team responded to the school.
Authorities are investigating to determine what cause the canister to explode.
The injuries were described as minor.
The student who was initially being treated at the field house was not exposed and was medically cleared.