The same Russian online troll farm that meddled in the American presidential election has also taken swipes at Canadian targets, including oil infrastructure and Justin Trudeau.

The U.S. indictment centred on a Russian troll farm only scratches the surface of the St. Petersburg agency that allegedly produced online content to sway the 2016 presidential election - and glosses over how unconvincing some of its stunts could be.

The aim of the factory's work was either to influence voters or to undermine their faith in the U.S. political system, the 37-page indictment states.