PROVIDENCE, R.I. (AP) — National Grid is violating federal and Rhode Island laws by shutting off the utilities of low-income and medically vulnerable individuals, according to a class action lawsuit filed Tuesday. The nonprofit groups Rhode Island Center for Justice and the George Wiley Center filed suit in Rhode Island Superior Court seeking class-action status on behalf of approximately 3,000 households in the state that are considered medically vulnerable and therefore protected from having utilities shut off. Rhode Island law offers protections to people who are seriously ill or disabled, allowing them to submit doctor's letters to National Grid showing hardship. According to the complaint, Medeiros' service was shut off before she went through that process.