Four people were killed and 40 injured Saturday night when the grandstand stage collapsed at the Indiana State Fairgrounds.In a press briefing at 12:25 a.m., Indiana State Police confirmed four deaths and said the wounded were taken to Methodist and Wishard hospitals."I want to be very frank that there could be other deaths," said state police Sgt. Dave Bursten during another briefing at 1:45 a.m.The fair will be canceled today, he said. It is expected to resume Monday with a public service to honor the victims.The fans at the Indiana State Fairgrounds' Hoosier Lottery Grandstand were being evacuated Saturday night to the nearby Pepsi Coliseum when a wind gust brought down the stage rigging for the country music concert.The gust of the wind brought down the production equipment shortly before 9 p.m. Saturday, according to Indianapolis Star reporter David Lindquist, who was at the fairgrounds for the Sugarland concert.WARNING, VIDEO IS GRAPHIC.http://www.youtube.com/watch?v=m1N-azJ76Ks&feature=player_embedded