Two brothers were arrested after the older brother, who had made terroristic threats at MidHudson Regional Hospital, was shot by his younger brother, according to City of Poughkeepsie police.

Adam Hannon, 28, was charged with making a terroristic threat, a felony. He was arraigned and sent to the Dutchess County Jail on $20,000 cash bail or $40,000 bail.

Zachary Hannon, 25, was charged with second-degree assault and criminal possession of a weapon, both felonies. He was arraigned and sent to the Dutchess County Jail on $20,000 cash bail or $40,000 bond.

City police were called to a residence on Yates Boulevard for a domestic disturbance at 1:12 a.m. Thursday, where they found Adam Hannon shot in the arm.

Town of Poughkeepsie Police said Adam Hannon had been at MidHudson Regional Hospital earlier in the night, where had threatened to return to the hospital with a firearm to kill people. He had visited the hospital to be treated for injuries sustained during a domestic incident, town police said.

After he returned home, Adam Hannon attacked his step-father, who was trying to keep him from leaving the house on his motorcycle, city police said.

Zachary Hannon grabbed a gun, which was legally owned by his step-father, from the house, and became involved in an altercation with his brother, at which time the gun went off, according to city police.

Adam Hannon sustained a non-life-threatening injury and was brought to Vassar Brothers Medical Center for treatment. He was arrested by town police upon his release from the facility.

Town police say numerous firearms were taken from the house by city police as part of the investigation.