Two juveniles were seriously injured Sunday evening when a tube they were riding collided with an unoccupied boat on Big Kandiyohi Lake, according to the Kandiyohi County Sheriff’s Office. The Sheriff’s Office responded to the crash at about 6:34 p.m. Sept. 6 in the 6600 block of 126th Avenue SE in rural Lake Lillian, Fahlun Township. Deputies learned a pontoon was pulling a tube carrying four juveniles when the tube struck an unoccupied boat, authorities said. Two of the four riders suffered serious but non-life-threatening injuries. The two injured juveniles were taken by ambulance to CentraCare Hospital in Willmar for treatment. The other two riders were not hurt. All four were wearing life jackets at the time of the collision, the Sheriff’s Office said. The Blomkest Fire Department, Kandiyohi County Rescue Squad, Lake Lillian Ambulance and CentraCare Ambulance assisted at the scene. The Kandiyohi County Sheriff’s Office continues to investigate the crash.