NEW : 11-year - old said a voice in his head told him to hit a classmate , the document says . The boy was patted down by school resource officers who found the weapons and ammunition . Incident occurred in Seattle , Washington . No one was injured . It came on the heels of several school - related violent incidents .
NEW : 11-year - old said a voice in his head told him to hit a classmate , the document says . Incident occurred in Seattle , Washington . No one was injured . It came on the heels of several school - related violent incidents .