A 15-year-old student at Auburn Junior High School was arrested for having a gun at school Thursday afternoon, Auburn police said.

Police say they arrested the male student after they found an “unexpected bullet” on school grounds at Auburn Junior High School.

After finding the bullet, police continued searching and found the firearm, police said. Police identified the 15-year-old male student and charged him with unlawful possession of a firearm and removed him from the school, police said.

Further details about what led to the discovery of the bullet and firearm weren’t released. Police say the student could face additional charges.