According to officials, calls came into hazmat shortly before 9 a.m. Friday to Shadow Hills High School on Jefferson Street. Firefighters were responding to what was believed to be a natural gas leak in the school's cafeteria.
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Southern California Gas Company was also on the scene while crews work to figure out where the potential leak is coming from.
According to the department, three people were experiencing symptoms from the leak, two had moderate enough symptoms to be transported to a local hospital. Authorities did not mention whether those affected were students or school staff.
Crews were on the scene for hours, and identified the source of the leak shortly before 2 p.m.
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