WFMZ reports Hamburg Area School District personnel were alerted to a “suspicious item” outside Hamburg High School and called police.

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According to the news station:

[Superintendent Steven] Keifer said police arrived, took a look at the suspicious item and immediately called the bomb squad.

Before the bomb squad arrived, school officials determined that the item was an old-style metal lunch box, similar to those used by construction workers in the 1950s, and it belonged to a student, Keifer said.

The contents of the lunch box weren’t disclosed, but the bomb squad was “called off” and students went back to their classrooms.