A German sailor whose mummified body was found on a yacht adrift off the southern Philippines had died of a heart attack about a week earlier, according to an autopsy report released today. Police earlier named the victim as Manfred Fritz Bajorat, based on documents found on the yacht last Friday, but still do not know where he had sailed from or where he was heading. "The cause of death is acute myocardial infarction based on the autopsy by (the) regional crime laboratory," national police spokesman Chief Superintendent Wilben Mayor told AFP. "The German national is estimated to have been dead for more or less seven days," he added, citing a statement by police in the southern Philippines. Bajorat was a 59-year-old veteran yachtsman who left his native Germany two decades ago and lost his long-time wife several years ago, according to Germany's Bild daily, which quoted an old friend. The newspaper also published pictures of the man hunched over a table in the main cabin, and cited forensics experts who explained that a combination of tropical heat, dry wind and salty sea air can quickly preserve or mummify a corpse.