39 pupils were taken to the hospital after being poisoned with unknown substance. Someone sprayed tearing substance in one of the halls of the school. Four hundred people were evacuated. Pupils complained on  dizziness, nausea, abdominal pain and redness of the eyes. The investigations continue. We remind this is not the first case of children’s poisoning. On 8 May on official event at school children started to lose conscious. 55 children and 4 adults were hospitalized. The reason of poisoning is still unknown.