U.S. public utility giant American Water says it has disconnected some of its systems after discovering that hackers breached its internal networks last week. American Water, which supplies drinking water and wastewater services to more than 14 million people across the United States, confirmed the security incident in an 8-K regulatory filing with the U.S. Securities and Exchange Commission on Monday. The New Jersey-based company said in its filing that its water and wastewater facilities are “at this time ...