A spokesman for a Pakistani rescue agency says hopes are starting to fade for finding more survivors in the rubble of a four-story factory which collapsed this week in the eastern city of Lahore. At least 26 people were killed.

Jam Sajjad Hussain, a spokesman for the Punjab Emergency Service, says the 400 rescuers have saved the lives of 102 workers since Wednesday, when the building suddenly caved in.

He says rescuers are cutting steel and picking through concrete on Friday, for the third day, to reach several workers believed to be still trapped.

The cause of the collapse is yet to be determined. It happened just over a week after a magnitude-7.5 earthquake hit Pakistan, killing 273 people and damaging nearly 75,000 homes.