The death toll from the building collapse in Bangladesh rose to 325, police said Saturday.
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. As the effort was under way, they dropped food and bottled water to those who called out.
Also Friday, a woman who gave birth under the debris was rescued, along with her infant, a fire service official said, according to the state-run news agency Bangladesh Sangbad Sangstha (BSS). Earlier, the agency had reported two women had given birth; it did not explain the change.
The news of survival and new life came as the 72-hour deadline to change the operation from rescue to recovery approached, even as hundreds more people were feared still trapped amid the rubble.
Officials coordinating the operation have said the rescue efforts would end Saturday morning, when heavy equipment will be used to retrieve the remaining bodies and cart away the rubble.
"You can see heavy cranes and bulldozers here to quickly remove the concrete debris, but we can't use them at the moment as our prime objective is to retrieve the people alive first," the military spokesman said Friday.
The planned use of heavy equipment ignited protests from the people who crowded near the rescue site, many of them relatives who were showing pictures of the missing to whomever would pay attention and saying they did not believe 72 hours was long enough to wait.
Police used tear gas to disperse them, BSS reported.
Sajjad Hussein, communications officer for Transparency International Bangladesh, told CNN from the scene that hundreds of relatives of victims were thronging a local school were bodies were being kept.
"People with photos of their relatives, mostly workers of the apparel factories, are asking the officials there for help. Whenever an ambulance is arriving at the spot, everyone is rushing towards hoping to find at least the body of their near and dear ones," Hussein said.
At a nearby medical college hospital, "thousands of survivors have been treated," said Hussein, whose non-governmental agency reports on allegations of corporate and political corruption in international development.
"The crisis for blood is acute and the hospital authority is urging people to donate blood for the victims. There is also a shortage of medicine. The local military hospital is also treating patients."
At the rescue site, the death toll from the collapse rose Friday to 307 as thousands of Bangladeshis filled the streets of the capital city of Dhaka in anger and rescuers raced to find more survivors.
"Our prime target is to rescue the rest of the survivors alive, as we are running against time," a military spokesman told reporters more than two days after the incident, BSS said. It did not identify the spokesman.
It was not clear how many of the products made in the factories in the suburban Dhaka town of Savar were destined for the U.S. market, but U.S. companies are major customers for Bangladeshi-made clothing.
In all, 2,375 people have been rescued, said Inter Service Public Relations Director Shaheenul Islam.
Seventy-two of them were recovered from the wreckage Friday, BSS reported, citing police.
Using hand drills and rod cutters, rescuers pierced the rubble of what had been the rear of the building and extracted 40 survivors, 20 of whom were then hospitalized in critical condition, BSS said.
The mound of concrete and steel, flecked with bolts of brightly colored cloth, had been an eight-story building housing five garment companies employing some 2,500 workers; a bank; a shopping mall; and offices.
"With no modern equipments to use, they are drilling holes and looking for survivors," Hussein of Transparency International told CNN. "Victims are shouting from inside the debris, there is the stench of dead bodies, blood -- things can't be worse."
He added that survivors who cannot be immediately freed from the rubble because of lack of equipment "are sent water, food and, in some cases, oxygen cylinders."
Collapse came a day after cracks appeared
The collapse in suburban Dhaka occurred Wednesday morning, a day after cracks appeared in the structure. It has stirred outrage in Bangladesh over lax safety standards in the country's key industry.
Most of the victims appear to have been garment factory workers, who had been told to report to work despite their concerns that the building's structure was not sound. The cracks led the bank to order its employees not to report for work Wednesday, and the shops in the mall were closed because of a strike.