Pakistan building collapses, trapping many in Lahore
Officials said the blast at the three-storey building could have been caused by a gas explosion.
One official told Reuters news agency that both the building and two houses next to it had "completely collapsed".
Reports said two bodies have been recovered. Rescue workers were trying to help those inside.
Estimates about the number of people trapped range from 30 to 100.
According to factory records, about 60 people were meant to be at work on Monday when the building collapsed. However, the blast occurred shortly after opening hours and correspondents say people may still have been arriving.
It is unclear how many children were in the building, but reports confirm that some are still trapped in the debris; Kazinform cites BBC.
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