PORT-AU-PRINCE, Haiti  As the focus on Saturday turned away from Haitians lost to those trying to survive, a sprawling assembly of international officials and aid workers struggled to fix a troubled relief effort after Tuesday’s devastating earthquake.

While countries and relief agencies showered aid on Haiti, only a small part of it was reaching increasingly desperate Haitians without food, water or shelter. “We see all the commotion, but we still have nothing to drink,” said Joel Querette, 23, a college student camped out in a park. “The trucks are going by.”

Hunger drove many to swarm places where food was being given out. Reports of isolated looting and violence intensified as night approached, and there were reports of Haitians streaming out of the capital.

Still, recovery and aid efforts were widening. And even the distribution problems in the country stemmed in part from good intentions, aid officials said: Countries around the world were responding to Haiti’s call for help as never before. And they are flooding the country with supplies and relief workers that its collapsed infrastructure and nonfunctioning government are in no position to handle.