There are more details on the deadly chain reaction wreck on I-55 in Logan County that claimed the lives of two children, but several questions remain.

The work zone crash near Atlanta claimed the lives of children, whose ages were 2 and 4.

Another child is in critical condition after being airlifted to Peoria.

The driver of the van carrying the children, 40-year-old David Rock of Chicago, is in fair condition.

His van was struck from behind by the semi driven by 24-year-old Taven Webster of Purcell, Missouri.

Charges are pending.