Miami, Florida (CNN) -- Not all of the earthquake-traumatized Haitians are receiving the aid they need, a U.S. general said Thursday, partly because displaced residents are moving from place to place. "We're still not up to meeting the needs of the Haitian people as far as the amount of supplies that are there. And so, there have been some instances, isolated, where we've been out to give distribution to citizens, there hasn't always been enough food," said Air Force Gen. Douglas Fraser, head of the Miami-based U.S. Southern Command. He added: "We haven't anticipated the demand, I guess, at each site as we've gone out because the Haitians have -- have migrated around, if you will, from distribution site to distribution site, so we're finding pockets that we haven't been able to get in to."
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NEW: U.S. still not meeting aid needs of Haitian people, U.S. general says
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NEW: People in need keep moving around, making it harder to help them, he says
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Damage to pier reduces how much aid can be unloaded, says Gen. Douglas Fraser
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Fraser says as many as a million Haitians lost their homes in January 12 quake
When was asked how much the @placeholder military effort was costing, he said he didn't know.