Rescuers pulled more survivors from beneath the rubble of collapsed buildings Thursday, but hopes were starting to fade of finding many more people alive more than three days after a catastrophic earthquake and series of aftershocks hit Turkey and Syria, killing more than 15,000.

Emergency crews working through the night in the city of Antakya were able to pull a young girl from the ruins of a building and also rescued her father alive two hours later, news agency IHA reported.

In Diyarbakir, east of Antakya, rescuers freed an injured woman from a collapsed building in the early morning hours but found the three people next to her in the rubble dead, the DHA news agency reported.

In addition to 12,873 people killed in Turkey, the country’s disaster management agency said more than 60,000 have been injured. More than 2,900 people have been reported dead on the Syria side of the border.

Tens of thousands are thought to have lost their homes. In Antakya, former residents of a collapsed building huddled around an outdoor fire overnight into Thursday, wrapping blankets tightly around themselves to try and stay warm.

“We tried to clear the debris on our own, but unfortunately our efforts have been insufficient,” the 45-year-old said.

Selen Ekimen wiped tears from her face with gloved hands as she explained that both her parents and brother were still buried.

“There’s been no sound from them for days,” she said. “Nothing.”

Experts said the survival window for those trapped under the rubble or otherwise unable to obtain basic necessities was closing rapidly. At the same time, they said it was too soon to abandon hope.

“The first 72 hours are considered to be critical,” said Steven Godby, a natural hazards expert at Nottingham Trent University in England. “The survival ratio on average within 24 hours is 74%, after 72 hours it is 22% and by the fifth day it is 6%.”

Turkey’s President Recep Tayyip Erdogan visited the hard-hit province of Hatay on Wednesday, where residents have criticized the government’s efforts, saying rescuers were slow to arrive.

According to the disaster management agency, more than 110,000 rescue personnel were now taking part in the effort and more than 5,500 vehicles, including tractors, cranes, bulldozers and excavators had been shipped.

The task is monumental, however, with thousands of buildings toppled by the earthquake.

Erdogan, who faces a tough battle for reelection in May, acknowledged problems with the emergency response to Monday’s 7.8-magnitude quake, but said the winter weather had been a factor. The earthquake also destroyed the runway at Hatay’s airport, further disrupting the response.

“It is not possible to be prepared for such a disaster,” Erdogan said. “We will not leave any of our citizens uncared for.” He also hit back at critics, saying “dishonorable people” were spreading “lies and slander” about the government’s actions.