A father and his son were pulled out alive from the rubble of a collapsed building on Sunday, four days after the devastating earthquakes that struck Venezuela.

It was a scene that gave hope to the French and US rescue workers active in the area as they race against the clock to find more survivors.

Rescue workers carried the pair, visibly weakened and both wearing masks, on improvised fabric stretchers through debris-strewn streets to a waiting ambulance, as a crowd gathered around the emergency vehicles ⁠in La Guaira.

“They are extremely weak, as any patient trapped under rubble for four days would be, so we are doing everything possible to rehydrate them and administer various medications during the extraction process, which is ⁠moving very slowly,” said a member of the French Civil Security. The rescue team in that area includes members of the French Civil Security and American responders from the Fairfax County Urban Search and Rescue Team in Virginia, who the previous day rescued a mother and ⁠her 9-month-old baby.

Before extracting the family members, rescuers prepared intravenous drips and cleared debris. Others remained beside the rubble searching for signs of life and communicating with their colleagues among ⁠the remains.

At least 33 people were rescued over the weekend, though tens of thousands remain missing, heightening fears that time is running out to find survivors.

According to ⁠specialists, after 72 hours following an earthquake, the odds of finding victims alive beneath the rubble drop dramatically.