A Long Island school was evacuated Wednesday afternoon after pepper spray was released outside a classroom, according to Nassau County Police. The incident occurred around noon at Northern Parkway School in Uniondale.

Although it's not clear exactly who released the pepper spray, ABC 7 is reporting that it was a student. ABC 7 also is reporting that 18 students and four adults were taken to the hospital with various symptoms. Students have since been allowed back into the school.

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