Stephanie Sandoval, 19, killed in semi-truck pileup on Interstate 10 near Quartzsite, Arizona

The big rig then rear-ended another semi along eastbound I-10 at milepost 44, west of Quartzsite , DPS said. The first semi burst into flames, killing the driver, DPS officers said. I-10 is closed eastbound at milepost 44 while officers conduct their investigation. One person was killed after 4 semi-trailer trucks collided in a second deadly pile-up on I-10 within hours. Officers are investigating a second deadly pile-up along Interstate-10 related to an earlier wrong-way driver accident near Quartzsite, the Arizona Department of Public Safety said. Late Friday night, one person was killed and another critically injured when a wrong-way driver plowed head-on with another vehicle within the I-10 eastbound lanes of traffic at milepost 63, east of Quartzsite , DPS said.