PITTSBURGH — A man accused of providing a white powdery substance tainted with fentanyl at an after-party in Pittsburgh last weekend, leading to the death of three men, has pleaded not guilty to numerous charges.

Peter Rene Sanchez Montalvo, 25, entered his plea Thursday, one day after a federal grand jury returned a seven-count indictment against him.

He faces a single count of possessing drugs with the intent to distribute and six counts related to the three deaths as well as injuries suffered by four other men who used the drugs.