Southbound Interstate-17 was closed for some time Friday morning south of Flagstaff after an early morning accident. The accident happened at around 2:42 a.m. at milepost 326 near Munds Park. DPS says a vehicle suffered a blown tire that caused it to be hit by a second vehicle. There were no injuries reported. The southbound lanes of I-17 reopened at around 5:15 this morning.