Two dozen students of Kendriya Vidyalaya, Rohini, Sector 25, had to be hospitalised on Friday after they developed an allergic reaction to the fumigation that was carried out in the school a day before.
Students complained of skin irritation, giddiness and nausea within minutes of entering the classroom and were rushed to the Baba Saheb Ambedkar Hospital, Rohini.
"All students have been discharged and are fine. The school did the best it could under the circumstances," said Dinesh Kumar, additional commissioner (academics), Kendriya Vidyalaya Sangathan (KVS).
According to Kumar, the school authorities had asked the civic authorities in the area to carry out fogging in the area to avoid an outbreak of malaria and dengue during the monsoon.
"This was not the first time that fogging was carried out in the school. It remains to be seen, however, why the students got sick. The incident happened only in one classroom. It seems like the chemical sprayed left behind a significant residue," he said, adding that he did not know which class the affected students were from.
The KVS has written to the school principal, asking for an explanation regarding the incident.