BARRIE, ONT. -- Eight people were injured, four seriously, when a tornado ripped through a Barrie, Ont., neighbourhood Thursday afternoon, leaving a trail of destruction in its wake. During a press conference Thursday evening, Barrie Mayor Jeff Lehman said there were so far no fatalities. "Everybody is accounted for, but it is early yet," he said. Fire officials said crews were checking "under every bed and behind every door" to ensure no one was trapped in the rubble. Officials said roughly 20 homes were damaged, and "about three or four" would have to be rebuilt. Early Thursday afternoon, an Environment Canada tornado warning blasted over the airwaves and to cell phones as the skies darkened over the south end of the city and heavy rain fell.