WORCESTER, Mass. — Authorities say an emergency room patient accused of stabbing a nurse at a Massachusetts hospital was unhappy about treatment he received for a wrist injury three weeks earlier.

Conor O’Regan, of Southbridge, is charged with attacking the nurse at Harrington Hospital in Southbridge on Wednesday. The nurse, Elise Wilson, was airlifted to UMass Medical Center for serious injuries.

O’Regan was arraigned Thursday on charges of assault with intent to murder and aggravated assault and battery with a dangerous weapon. He was ordered held without bail pending a dangerousness hearing Monday. He will also be evaluated at Bridgewater State Hospital for 20 days.

O’Regan allegedly told police that someone commanded him to be “a warrior for the cause.” He allegedly said that the nurse “happened to be the unlucky one that suffered the attack.”

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