I think you've seen that the RCMP is doing an investigation to understand what's going on from the criminal perspective and who those sources could be and whether there was an exchange of money, so that investigation is going on. As well, CSIS is constantly looking at foreign actors and state actors and their activities in Canada.
Evidence of meeting #44 for National Defence in the 44th Parliament, 1st session. (The original version is on Parliament’s site, as are the minutes.) The winning word was interference.
A recording is available from Parliament.