[Updated at 1:11 p.m. ET] Rescuers tunneling Friday into the rubble of the eight-story building that collapsed Wednesday discovered another 50 people trapped on what remained of its third floor, an official said.

Bangladesh Fire Service Deputy Director Maj. Mizamur Rahman said rescuers were hoping to free them within a few hours.

Also Friday, two women who gave birth under the debris were rescued - along with their infants - a fire service official said, according to BSS.