New York expanded its lawsuit against opioid manufacturer Purdue Pharma on Thursday to include claims against several other manufacturers, opioid distributors and the family that owns Purdue over allegations that their actions negligently exacerbated the state’s opioid crisis.

Attorney General Letitia James announced the new litigation Thursday morning in Manhattan, where she said it will be the country’s “most extensive” lawsuit aimed at addressing the ever-growing problem of opioid addiction.