Large quantities of relief supplies are arriving in southern Asian countries hardest hit by last Sunday's tsunami, but officials are encountering problems distributing much of the aid.
United Nations officials say the overall death toll is approaching 150,000 and there are fears that diseases such as cholera and typhoid could double that.
Humanitarian supplies from many countries are pouring in by ship and aircraft to Indonesia's Aceh Province and other areas hit hardest in the disaster zone.
But food, water and critical medical supplies are stacking up because of difficulty reaching the hardest hit areas.
Torrential rains have added to the difficulty in Sri Lanka, where many people left homeless by the tsunami have been forced from their temporary shelters by flash floods
An earthquake of magnitude 6.5 hit just off Indonesia's Sumatra coast today (Saturday) -- the third strongest of nearly 100 notable aftershocks since last Sunday's devastating quake and tsunami.
There are no immediate reports of damage or tsunamis from the latest seismic activity.