Multiple people became sick at a Pennsylvania middle school Thursday in what originally was called a carbon monoxide problem, WFMZ reported.

>> Read more trending news

Fleetwood Middle School was closed Friday after several people became ill during a dress rehearsal by the Fleetwood Community Theater group. Superintendent Greg Miller told the television station.

"One at a time, we had a few of them become ill. Not feel well, light-headedness … because of it escalating from one to the next, the director who was there did call 911 because of the quick escalation," Miller told WFMZ.

Nicholas Readinger, Fleetwood's deputy fire chief, said a sweep of the building showed no signs of carbon monoxide or other gases, the Reading Eagle reported. Readinger did say 12 student actors were taken to area hospitals, the newspaper reported.

Between 30 and 40 people were evacuated from the school after 911 was called, the Eagle reported.

About the Author

Keep Reading

Blue heron are just one of the hundreds of kinds of animals and plants that call the Okefenokee Swamp home. (Hyosub Shin/AJC)

Credit: HYOSUB SHIN / AJC

Featured

The renovation of Jekyll Island's Great Dunes golf course includes nine holes designed by Walter Travis in the 1920s for the members of the Jekyll Island Club. Several holes that were part of the original layout where located along the beach and were bulldozed in the 1950s.(Photo by Austin Kaseman)

Credit: Photo by Austin Kaseman