(Rapid City, SD) — The scene at South Dakota Mines is cleared after a bomb that on campus. Administrators sent out a message with the all clear Saturday morning. Rapid City police had investigated the campus the night before after a suspect said they had placed 40 to 45 bombs on the campus and threatened to detonate them. The suspect demanded that a conspiracy theory tweet be place by Black Hills FOX/KOTA Territory News. Police say the investigation in the suspect in the false threat remains open and ongoing.