(TULSA, Okla.) — Oklahoma’s attorney general will announce a settlement Tuesday with drugmaker Purdue Pharma Inc. in a case that’s expected to be the first state lawsuit accusing major drug manufacturers of fueling the opioid epidemic to go to trial.

Attorney General Mike Hunter will hold a press conference that will include an “announcement of a settlement agreement with Purdue Pharma,” according to a statement from Hunter’s office. The lawsuit also names a dozen other opioid manufacturers.

Alex Gerszewski, a spokesman for the attorney general, confirmed Tuesday morning that the settlement with Purdue would be announced later in the day in Tulsa, but he declined further comment about the settlement. He also said the trial is still scheduled to take place in late May.