By Tim Hanlon Fifteen people were injured when they were attacked by piranhas as they bathed in a river. Firefighters had to take at least four people to the local hospital last Saturday with the others able to go to A&E on their own on the same day. The victims suffered bites to their feet by the sharp-toothed fish. They were attacked as they cooled off in the Tietê River off Pôr-do-Sol Beach in Pereira Barreto, Brazil. A snap shows how one victim received a nasty bite to the sole with blood seen pouring from the open wound. Local officials have since sent biology experts to the scene and the…