West Franklin High School in Pomona was locked down Monday morning after a student walked into the building with the stock of a shotgun.

Franklin County sheriff’s officers were called to the school, which is about 10 miles west of Ottawa, about 8:10 a.m. after a parent saw the student enter the building, according to Monica Finch, a 911 dispatcher shift supervisor. Originally, officials thought the student was carrying a weapon.

Finch said the student was questioned. Officers determined the student planned to sand the wooden stock during class at the school, which formerly was called Pomona High School.