Cyberabad Police Commissioner Sandeep Shandilya told PTI that Rekha, aged around 35, and her son aged around 3-4, who hailed from Chattisgarh, were pulled out alive from the crash site today.
A total of 13 people -- construction workers --, mostly from Bobbili in Andhra Pradesh's Vizianagarm district, were trapped in the seven-storeyed building when it came crashing down in Nanakramguda.
Rescue operations are in full swing at the spot.
"The lives of two have been saved," Greater Hyderabad Municipal Mayor Bonthu Ram Mohan said.
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The Telangana government announced an ex-gratia of Rs 10 lakh to the next of kin of those killed in the incident, K T Rama Rao said.
"NDRF personnel along with workers of local administration are involved in the rescue operations," the Mayor said.
He said the rescue work took time as the way to the collapsed building is narrow. More rubble clearing machines have arrived for the operations, he said, adding some violation of rules have been found in the construction of the building.