Rescuers are struggling to locate the source of noises heard at the site of a school buried under a massive landslide in the Philippines.
Emergency officials said Monday that sensing equipment had picked up sounds at the site on Leyte island, but they are unsure what is causing them.
Officials say they have recovered 72 bodies from the mud, and say hundreds of others may still be trapped. No survivors have been found since Friday, when heavy rains triggered the landslide.
Continuing rain and heavy winds have hampered the work of rescue crews, which include U.S. Marines and personnel from Malaysia and Taiwan.
U.S. military officials have promised to send some 3,000 troops to the affected area.
The White House said President Bush called President Gloria Arroyo to express his condolences over the loss of life.Some information for this report was provided by AFP and AP.