A 76-year-old patient at a Massachusetts hospital stabbed a nurse in the neck with a pocket knife, police said.

At the Greenville, New Hampshire, man's arraignment on Tuesday, the judge entered not guilty pleas on his behalf to charges of assault and battery with a dangerous weapon and attempt to commit a crime. He was held on $100,000 cash bail.

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The suspect stabbed the nurse in the emergency room at Heywood Hospital in Gardner at about 8 p.m. Monday, police said. The nurse was adjusting the man's oxygen tube when he grabbed her and stabbed her, prosecutors said.

Boston, Plymouth, Worcester crimes

A nurse in a Massachusetts emergency room was reportedly stabbed with a pocket knife by an elderly patient.

The nurse was taken to UMass Memorial Medical Center in Worcester, Massachusetts, for treatment of a roughly 3-inch long laceration, prosecutors said in court. The nurse's condition was not available.

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The suspect's attorney said his client is not a flight risk, has significant health issues and has been told he has six months to live.

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"Violence against caregivers is not acceptable," Heywood Healthcare CEO Rozanna Penney said in a statement. "In addition to the adoption of a zero-tolerance policy, expanded screening protocols are being assessed to ensure the safety of our caregivers and patients."