NJ State Police officials are looking into the cause of a crash that killed a man from Pennsylvania Saturday morning.
According to NJ State Police, the crash was reported at 6:16 a.m. on the eastbound ramp of I-78 at mile marker 57.4 local lanes in Newark. 
Officials said a preliminary investigation revealed a Freightliner tractor semi-trailer was traveling east on Interstate 78 in the left lane of the local lanes.
While in milepost 57.4, police say the left front of the Freightliner impacted and traveled against the left metal guardrail.
The Freightliner traveled east until the guardrail ended and began crossing roadways on the left.
According to NJ State Police, the Freightliner traveled across curbed medians as it crossed the on-ramps from US 1 and US-9. The Freightliner then crossed the I-78 eastbound express lanes and impacted the center concrete barrier traveling up and over the same.
Police say while out of control, the Freightliner impacted a Clover Farms Transportation tractor semi-trailer that was traveling westbound in the left lane of the express lanes.
An additional three vehicles traveling westbound in the express lanes were also struck by the truck and/or roadway debris.
After the impact, both tractor semi-trailers subsequently caught fire.
Police say as a result of the crash, the driver of the Freightliner, identified as Mr. Israel Herrera Flores, 45, of Philadelphia, PA, sustained fatal injuries and the driver of the Clover Farms truck, identified as Mr. Rigo O. Evangelista, 42, of Reading PA sustained severe injuries.
No other injuries were reported.