Toronto Police are responding to an active shooter at the Salsa on St. Clair festival after a gunman opened fire on St. Clair Avenue West near Arlington Avenue.Officers find five people with gunshot wounds; two are pronounced dead at the scene and three are hospitalized with injuries that authorities have not yet detailed.Thousands fled the festival as police sealed roads, launched an urgent search for the suspect and urged the public to avoid the area while the investigation continues.No suspect description or custody status has been released and investigators say witnesses and video evidence will be key to determining the motive and sequence of events.