(Reuters) -A red-brick building partially collapsed in an explosion on Chicago’s West Side on Tuesday, sending eight people to the hospital, including three who were in a serious or critical condition, the city’s fire department said. Images and a video clip posted by the fire department showed damaged top floors at West Washington Boulevard and North Central Avenue. The video showed bricks scattered around the corner building and parked cars damaged from fallen debris. The cause of the explosion, which prompted the evacuation of an adjacent building, was unknown, the Chicago Fire Department s…