They said nobody was injured in the incident as the classroom was empty at the time of the collapse.
Bricks came tumbling down near the main passage of the school, close to the dining hall and the drinking water taps, police said, adding that as many as 957 girls are enrolled at the institution.
School authorities said that the 70-year-old school building was in urgent need of repairs.
As many as 18 out of 25 classrooms at the facility have been declared unsafe by PWD, they said.
When Punjab Bahujan Samaj Party president Parkash Singh Jandali and its general secretary Jarnail Nangal today raised this issue with ADC SK Singla, the latter assured them that he would personally look into the matter.
Principal Nirmal Singh, when contacted, said that he has written many letters to the authorities concerned regarding the dilapidated structure.
