An unknown disease has caused the deaths of thousands of wild Teal ducks in north-western Iran, but a government official said today the cause was not the bird flu strain that has killed birds in Romania and neighbouring Turkey. Behrouz Yasemi, an official with Iran's State Veterinary Organisation, blamed a "mysterious disease" for the deaths of 3,692 wild ducks. "We were looking for bird flu [but] medical tests have definitely ruled out flu," Yasemi said. "Experts are now in the process of diagnosing this mysterious disease. We may be able to diagnose it in the next few days." The...