'People trapped' in "Pakistan" building collapse.

A building is reported to have collapsed in the Pakistani city of Lahore, possibly trapping dozens of people inside.
  Officials said the explosion could have been at the three-story building caused by a gas explosion.
  An official from the news agency Reuters that both the building and two houses next to him was "completely collapsed".
  Reports said one person was confirmed dead. Rescue workers tried to help, within the.
  "Initial reports say more than 100 people were in the factory when it collapsed, possibly due to a gas cylinder explosion," was quoted by official rescue Muhammad Aamir news agency AFP as saying.
  According to witnesses, about 150 people were working normally at the factory.