At 1:43 p.m., the North Sioux City Fire Department responded to Hepar Bio Science for reports of a fire. Upon arrival, more than just steam could be seen leaving through a roof vent. According to the North Sioux City Fire Department, the fire started due to equipment overheating and they were on the scene (3148 N. Highway 105) for approximately two hours. Twelve members of the fire department responded to the call with five of the departments apparatuses. Submitted photo