(Sioux Falls, SD) — Sioux Falls Police are investigating three separate reports of shots fired. The first report was made just before 2 a.m. yesterday morning in the 12-hundred-block of West 10th Street. Residents of an area home say they had to take cover after hearing shots. The second incident happened about four-and-a-half hours later in the 400-block of South Summit Avenue, where four gunshots were heard. Shell casings were recovered from the area. The final call came in ten minutes late in the 200-block of North Dominick Circle. No shell casings were found. It is not known if the incidents were connected.