Moose Jaw Police say they received a complaint of a threat involving a school shooting yesterday (sat) afternoon that was going to take place at Central High School. In a news release, police say the threat was circulating through the social media app Snapchat. Once police began investigating, they were able to determine that the threat originated from St. Joseph, Missouri. Moose Jaw Police then contacted the St. Joseph Police Department and they were able to confirm that the threat did indeed happen in their jurisdiction. St. Joseph Police have arrested three youths in connection to the event.