Officials in Atsugi, Kanagawa Prefecture, have declared a local stream off-limits to children after three piranhas were caught in a nearby river over the weekend.

The city on Tuesday warned residents, especially children, about the potential danger posed by the voracious meat eaters during the Golden Week holidays, after two were caught Saturday in the Zenmyo River by nearby residents and a third by a man in the area Monday. The fish were about 10 cm long.