A first-grade student brought an unloaded gun to a York City school Tuesday.

York City School District officials determined the student brought the weapon to Jackson K-8 in a book bag, according to a letter sent to parents.

No one was hurt.

York City Police Chief Wes Kahley said police are looking into how the student got the gun, which was discovered on the floor in the cafeteria during breakfast.

A student saw the weapon and informed a teacher, who "quickly secured the weapon and brought it to school police officers," according to the letter.

The building at 177 E. Jackson St. was put on lockdown for about 90 minutes while district officials investigated.

"The health and safety of your children is paramount to us as a school district," the letter reads. "While we regret that these types of incidents occur, we are also confident in the procedures that we have in place to handle them while keeping your children safe."

Students and staff were "extremely cooperative," according to the letter.

Reached by phone Tuesday afternoon, superintendent Eric Holmes said the district informed parents of the incident and the lockdown through a robo call.

"We wanted to make sure that parents were aware of the incident that took place," he said.

Tanisha Harris, who has a son in fifth grade at Jackson, said she was generally pleased with the way the district handled a scary situation.

However, Harris said, the robo call came late in the day and only informed parents the school had been on lockdown.

"That doesn't tell a parent anything," she said.

- Reach Erin James at ejames@yorkdispatch.com.