The chaotic rescue effort by Red Cross workers, U.N. peacekeepers and Haitian authorities was inhibited from the start by thousands of grieving neighbors, who blocked the steep, narrow street and fought with school officials to enter the collapsed building in search of their children and friends.
U.N. peacekeepers and Haitian police were able to establish some order by setting up human chains and checkpoints along the road in the hills above Port-au-Prince. But they have been unable to get heavy equipment through the crowds and to the scene, leaving rescuers to essentially work with their hands.
At least 39 bodies were brought to the morgue at Port-au-Prince's General Hospital, Haitian police spokesman Garry Desrosier said.
Another eight people died in a trauma center run by the aid group Medecins Sans Frontieres, or Doctors Without Borders, spokesman Francois Servranckx said. More than 80 others were being treated for injuries by the aid group.
Several nearby houses were also damaged in the collapse.
Neighbors suspected the building was poorly rebuilt after it partially collapsed eight years ago, said Jimmy Germain, a French teacher at the school. He said people who lived just downhill abandoned their land out of fear that the building would tumble onto them, and that the school's owner tried to buy up their vacated properties.
The concrete building's third story was still under construction, and Petionville Mayor Claire Lydie Parent told The Associated Press she suspects a structural defect caused the collapse, not the recent chain of tropical storms that swept devastation across Haiti.
Police commissioner Francene Moreau says the minister who runs the church-operated school could face criminal charges. Efforts to reach the preacher were not successful.
U.N. military commander Maj. Gen. Carlos Alberto Dos Santos Cruz said the accident is the worst he has seen since coming to Haiti almost two years ago.
The building collapsed into little more than a twisted mountain of concrete, out of which protruded the mangled, bloody bodies of students killed in the collapse.
Thousands looked on from beside the school and across the valley, cheering each time a live student was extricated from the debris. One student who emerged and was lifted on a stretcher cried and made the sign of the cross over and over.