Ahead of the beginning of the Sturgis Rally, Two people on a motorcycle were killed in a crash with a semi and two others on a separate motorcycle were taken to Regional Health Rapid City Hospital Thursday, with serious non-life threatening injuries. Around 2:30 p.m. first responders were called to Box Elder at South Ellsworth Road and Highway 14/16 to a collision involving two motorcycles and a semi. According to South Dakota Highway Patrol’s preliminary investigation, the motorcycles were traveling westbound on Highway 14/16 and failed to stop a stop sign at the intersection and collided with the semi. One person was pinned under the semi; the other person was several feet away from the bike.