A 13-year-old girl has admitted to placing bullets in a bathroom at Panther Valley Junior-Senior High School two days in a row, according to Summit Hill Police.

On Friday the school was placed on lockdown after someone reported finding a .30-06 round in a girls bathroom. It was the second lockdown in as many days at the school.

Summit Hill Police identified a 13-year-old girl as the potential suspect and she admitted to placing the round in both incidents. Police plan to file charges, but they did not release the suspect’s name because she is under the age of 18.

The bullet found Friday was a different caliber from the one found Thursday, which was a .243-caliber, according to police.

Superintendent Dennis Kergick said the district is trying to end a trend of lockdowns at the school in recent months. He said that it requires cooperation between the school and parents.

“The district cannot do this alone,” Kergick said. “We desperately need parents to discourage their children from bringing any type of contraband into our school.”

He added, “Bringing bullets or weapons into the district buildings will result in criminal charges and possible expulsion. This is no longer a laughing matter and any such pranks will result in serious ramifications.”

Previously bullets were found in the cafeteria on March 18 and in a girls locker room on May 11.

Summit Hill police also charged a 15-year-old girl in connection with a lockdown June 1 at the school.

The girl is a student at the school and has been charged with terroristic threats after a threat was made to “shoot up the school,” according to a release sent by police Wednesday night.

The school was on lockdown for two hours June 1 after threatening graffiti was found in an eighth-grade girls bathroom.

Summit Hill police and an official of the Carbon County Emergency Management Agency were called to the scene.

Police interviewed the student and she admitted to the threat.

“It is frustrating and very disheartening,” Kergick said Friday morning. “We have several plans in place to reduce similar instances, and we will be vigorously addressing our concerns through many legal channels.”