A medical student at Dalhousie University in Halifax who was charged last month with uttering death threats and engaging in threatening conduct faces a new charge.

Stephen Tynes is now accused of unauthorized possession of a prohibited device in relation to an overcapacity cartridge magazine. He'll be in court Sept. 15.

Tynes has been suspended from the university and banned from all of its campuses.

According to court documents, Tynes was arrested last month after meeting with a psychiatrist and telling the doctor he would use a gun to kill up to 20 people and himself.

Among those he intended to kill, the documents allege, were the associate dean of undergraduate medical education and her daughter, who was also his classmate at Dalhousie's medical school.

He was charged on Aug. 21.

As part of that investigation, police executed a search warrant at Tynes's home and and seized 1,834 rounds of rifle ammunition, a Russian SKS rifle, a Henry Golden Boy .22-calibre rifle, a banana clip for a rifle, a baggie with three clips and a bore cleaner, two ammunition boxes, a firearms acquisition card and a gun club card.

He's currently out on bail and must live at his father's home in Truro.

Tynes is not allowed to come within 25 kilometres of Dalhousie's Carleton campus in downtown Halifax, or possess firearms, alcohol or drugs.