VIDEO: Two people are dead following a multi-vehicle crash along Interstate 10 south of Phoenix, the Arizona Department of Public Safety said on Wednesday. The crash happened just after 12 p.m. on Oct. 16 at milepost 169, which is about two miles south of Riggs Road. DPS says traffic was moving slowly in the westbound lanes when a box truck failed to slow down and crashed into a pickup truck and three other vehicles. The collision pushed both the box and the pickup truck into the median and both vehicles caught fire. Both drivers were pronounced dead at the scene. They were not identified. Two other drivers suffered non-life-threatening injuries. I-10 was closed in both directions between Riggs and Casa Blanca Roads, but the roadway has since reopened.