NORTH PROVIDENCE, R.I. (AP) — North Providence's school superintendent has confirmed that "slightly elevated" levels of radon were found at two city schools last year.

Superintendent Bridget Morisseau told the school committee Wednesday that the cancer-causing gas was found in two classrooms at Whelan Elementary School and one classroom at North Providence High School.

The Providence Journal (http://bit.ly/2w397Vg ) reports that Morisseau said following the elevated test results, the district has scheduled long-term testing in all three classrooms.

She said that planned work on various schools is not related to radon levels in school buildings.

The tester who originally detected the elevated levels said she believes the radon levels have since subsided to levels below the numbers that trigger required actions under U.S. Environmental Protection Agency regulations.

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Information from: The Providence Journal, http://www.providencejournal.com