This is not a laughing matter. It's serious and we follow up on it very hard. Even when there turns out to be no threat, it is an inconvenience for obviously everybody. As a result, we are pursuing legal action.

They were immediately told to gather in the cafeteria and then led out of the building. Most of the students, though, never made it in the door. They were stopped outside and directed by staff to an off-site gathering area.