Bethel Middle school was put into a modified lockdown this morning, after shell casings from a 22-caliber firearm were found outside a cafeteria door.

In a written statement Superintendent Kevin Smith said a student brought the shell casings to school, and there was no evidence of a credible threat.

The lockdown was lifted about 11:15 in the morning.

Police with a dog, and school officials searched the school.  Students in the cafeteria were questioned.

Education officials say all students are safe.

The superintendent sent a message to parents explaining the situation, and saying “In the wake of the Newtown Massacre, our world has changed. Providing a safe school climate is paramount.”

Smith asked parents to “be cognizant of the kinds of things students bring in backpacks or pockets.  Shell casings were clearly inappropriate.”