Smith & Wesson Brands Inc. and Springfield Armory Inc. semi-automatic pistols for sale at Hiram's Guns / Firearms Unknown store in El Cajon, California, U.S., on Monday, April 26, 2021. President Joe Biden's planned executive actions would crack down on "ghost guns," which can be assembled from kits and are not traceable by law enforcement because they lack serial numbers, as well as braces for pistols that make firearms more stable and accurate. Photographer: Bing Guan/Bloomberg 
Medics were at the scene of the incident, and there is no wider threat to public safety, Toronto Police said on Twitter. The suspect, whose condition was not immediately clear, was described as a male in his late teens or early 20s, the police said.
The incident occurred in Port Union, a residential area north of Toronto's city centre. All the school lockdowns were lifted after several hours, the Toronto District School Board said.
(Reporting by Rami Ayyub and Eric Beech; Editing by Leslie Adler and Sandra Maler)