'The step has been taken as a precaution against swine flu as it is the school's first case,' the official added.
The Banyan Tree School suspended classes only for standard IX for a week's time.
School authorities told students, especially those who had traveled in the bus that was used by the child detected with the virus, to stay at home for a week.
'Class IX has been given a one-week leave after we came to know that one of the students of this class tested positive for swine flu virus. They will join school from Sep 14,' the official added.
The national capital also reported its fourth swine flu case Monday when a 69-year-old died due to the virus at the Ram Manohar Lohia Hospital. The total death toll in India has gone up to 135.
A 12-year-old girl with acute respiratory problems continues to be critical at the Ram Manohar Lohia Hospital, doctors said.