At least two people were killed and dozens more trapped when a three-storey factory building collapsed Monday in Pakistan's eastern city of Lahore, officials said. The building collapsed due to a gas explosion that also brought down two nearby houses, according to a report of DPA. Police official Sarfraz Falki said rescue workers had pulled two bodies and eight injured people from the debris. "According to some estimates there are between 70 and 80 people that are trapped under the rubble," Falki said. "We fear that the death toll might rise significantly."