Researchers in Germany are still trying to figure out what is causing the presumed spontaneous combustion of about 1,000 toads near a pond in Hamburg. Officials say tests are being conducted on the toad's body parts and the pond's water, but no links have been discovered. Analysts say the toads typically swell up prior to exploding, however, scientists are thus far unable to determine if the condition is caused by a virus or bacteria. A local enviornmentalist says, "It looks like a scene from a science-fiction movie. The bloated animals suffer for several minutes before they finally die." Officials say the toads first began to show up early last month at a pond in the upscale neighborhood of Altona. The animals fill up like balloons until their stomachs suddenly burst. Janne Kloepper, of the Hamburg-based Institute for Hygiene and the Environment, says "It's absolutely strange. We have a really unique story here in Hamburg. This phenomenon really doesn't seem to have appeared anywhere before." City residents have been warned to stay away from the pond while more testing continues.