He said he is sure that school officials will review the incident as a matter of routine to make sure all the right protocols were followed.

Law enforcement and the fire department blocked all entrances and exits to Walnut Middle School because they did not want any parents mistakenly trying to get to the school to pick up their children, Falldorf said. Parents of Walnut students were informed that they were to pick up their children from Grand Island Senior High.

Jack Sheard, GIPS communications coordinator, said Walnut parents were allowed to pick up their children as though Wednesday was an early dismissal day. Students had to sign out to show school officials that they were either riding home with a parent, walking home or riding the bus.

Sheard said that all Walnut after-school events for Wednesday were canceled. Students will return to Walnut on Thursday as part of their regular schedule.

Rick Ressel, GIPS safety coordinator, held a brief press conference at Grand Island Senior High to provide a few more details about the evacuation. He said that the latched box for the accordion did not look at all like a normal container for a band instrument or any other instrument.