Seven Toronto police officers have been arrested in a major investigation by York Regional Police (YRP), a source confirms to CityNews. The investigation, dubbed 'Project South', is a lengthy probe into organized crime and corruption. Four of the officers have been suspended without pay. The source reveals that the Toronto Police Service initiated the investigation but handed it over to YRP due to new rules requiring an unbiased force. YRP Chief Jim MacSween, Deputy Chief Ryan Hogan, and Toronto Police Chief Myron Demkiw will address the media at YRP's headquarters in Aurora on Thursday morning, with the news conference live-streamed on CityNews 24/7. The Toronto Police Association confirms the arrests, but has no further comment. This developing story will be updated as more details emerge.