A fatal accident closed southbound Interstate-17 early Thursday morning near Black Canyon City. ADOT says the crash happened at around 3 a.m. at milepost 252. The crash was a rollover involving a car and a tractor trailer. DPS says the crash killed a ten-year-old girl and injured her father and his 14-year-old brother. Southbound traffic was stopped at the Sunset Point rest area and was being turned around there to head back north. The closure lasted nearly five hours. The cause of the accident is not known.