23 Hurt After Spray at Osaka School

Something bad happens at a school. It is in Osaka. It happens on Friday morning. Someone sprays a substance. It goes inside the building. No one knows the substance. No one knows what it is. The spray goes into the air. People breathe it in. Fifteen students get sick. Their throats hurt. Eight teachers also get sick. The total is twenty-three people. They are inside the school.