Bulgaria is on high alert due to reports of a large black cat, possibly a panther, sighted in Shumen. Authorities are investigating after a video surfaced showing a black silhouette in a park. While there have been past unverified attacks by wild black cats in Europe, experts suggest the sightings may be domestic cats or escaped exotic pets. The situation has led to a surge of memes and dubious claims online, with police warning against visiting the park.