Pamela Indiaka says the Red Cross is providing body bags and has dealt with 75 bodies so far.
The death toll from Monday's blast may still rise.
Richard Lisiyampe who heads Kenyatta National Hospital says at least 112 burn victims have arrived.
A reporter for The Associated Press saw charred bodies scattered throughout the remains of burning shacks for nearly 1,000 feet (300 meters) around the site of the explosion. Some were also floating in a nearby river filled with sewage. Other residents say they had jumped into the river after catching fire.