(Texarkana, AR) -- Arkansas state police continue to investigate a chain reaction crash that killed four people.

It happened early Tuesday morning near Texarkana.

Police say two 18-wheelers and two other vehicles were slowed for construction on I-30.

One of the trucks hit the car in front of it and then burst into flames after impact.
The two people in that truck died.

Police say two people in a second car also died when their vehicle was crushed between the two trucks.
I-30 was closed most of the day to clean up the accident.