Two tractor trailers caught fire on I-77 during a pileup involving dozens of vehicles late Tuesday afternoon, Cayce police reported.
It was a snowball effect, said Cayce police Lt. Jeff Simmons.
One of the burning trailers jack-knifed, he said.
Putting the fires out and untangling the vehicles took hours.
Traffic was halted on I-77 and slowed considerably on I-26 during the incident.