Ten people savaged by flesh-eating piranhas in Argentinian river as they tried to cool off in blistering 41C heat. At least 10 people have been injured by piranhas in the same Argentine river where a similar attack by the carnivorous fish occurred last month. The vicious creatures, known as palometas, have been attacking bathers since Thursday at the Parana River in Rosario, which is 186 miles north-east of Buenos Aires.