Authorities say a 16-year-old student bit into a razor blade while eating a chicken sandwich he purchased at his high school.

The Flagler County Sheriff's Office says Craig Beat was not injured when he discovered the blade in his chicken patty Sept. 21.

Beat tells school officials he bought the sandwich at Flagler Palm Coast High School and sat down to eat it in the school's lunchroom.

Investigators do not know how the razor blade got into the sandwich.

A spokeswoman for the Atlanta-based company that prepares and distributes the sandwiches says an internal investigation concluded the razor blade must have been inserted into the chicken patty after it left the plant where it was cooked and frozen.

According to Gold Kist Inc. spokeswoman, Karla Harvill, no razors are used in the manufacturing process, and all food leaving the company's plants pass through metal detectors.

Officials say Gold Kist products have since been removed from all cafeterias in the school district.