Update: 1:50 p.m.
Peterborough police say a man was apprehended “for his own safety” and has been taken to Peterborough Regional Health Centre for treatment.
The roads in the area have reopened.
Details are still slim, but Peterborough police shut down Park Street between Dalhousie and Wolfe streets around 12:45 p.m. Tuesday.
They have asked the public to stay away, while officers investigate what police refer to as “a matter.”
Witnesses say a rifle could be seen drawn at one point.