CHICAGO (WLS) -- Lane Tech High School is being evacuated Thursday due to some type of "environmental issue," according to a CPS spokesperson.
In a letter to parents, Chicago Public Schools said there was a report of "a small quantity of mercury in one of the bathrooms."
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The area was immediately secured, officials said.
CPS said they are working with a hazardous materials response team to assess the situation.
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Thursday's schedule LSC meeting has been cancelled and all other activities have also been stopped out of an abundance of caution, CPS said.