Luxembourg
In 2009, a black panther was allegedly spotted in the industrial area of Bommelscheuer near Bascharage. When police came, the panther was gone. In the following couple of days, the panther was spotted all over the country. For a while it was alleged that a panther had escaped a nearby zoo (Amnéville), but the zoo later denied that any panther was missing. A couple of days after the Bascharage incident, it also was mentioned that although the police did not find a panther, they did find an unusually large housecat.
Read more about this topic: Phantom Cat