Nine bodies were recovered late Friday from the building in a village in Gujarat state.

Another two bodies were found during the night as rescue workers using cutters and hydraulic cranes shifted the debris, working under floodlights.

"Rescue workers removed two more bodies from the rubble during the night-long search," Surat district official Vatsala Vasudevan told the Press Trust of India (PTI) news agency.

"The operation is over as there do not seem to be any more people trapped in the debris. Workers are sifting through the rubble," she said.

The 14 injured schoolgirls were being treated in hospital, she added.