Five people are dead after a truck driver fell asleep at the wheel and crashed into stopped traffic on I-20 over the weekend. 

The accident happened on Saturday, June 28th at about 2:40 p.m. on Interstate 20 near Hiram Road in Kaufman County, east of Dallas, Texas. 

According to CBS, 27-year-old Alexis Osmani Gonzalez-Companioni fell asleep as he was driving near the Hiram Road bridge, causing him to crash into stopped traffic on I-20 for a previous crash. Gonzalez-Companioni then crashed into a Ford F-150 before slamming into two other tractor trailers. One of the secondary tractor trailers then jackknifed and struck a Jeep, a Mustang, and a Honda. The chain reaction crashes involved a total of seven vehicles. 

Four people inside of the F-150 were pronounced dead at the scene. The fifth person was flown to a nearby hospital in critical condition. One person in the Jeep hit by the jacknifed semi truck was also pronounced dead at the scene. 

The Terrell Volunteer Fire Department deemed the crash a “horrific” “mass casualty.”

“All you could see was one 18-wheeler, half of the back end was missing,” said Leak Akins, who was working at a nearby business, to 5 NBC. “And then another 18-wheeler, the cab was completely gone.”

“There’s a lot of truck drivers that go through here, so it’s pretty bad that they don’t know how to pull over whenever they’re getting tired, or they’re pushed to the limit,” Akins continued.

Gonzalez-Companioni is currently in custody on five counts of manslaughter and one count of aggravated assault with a deadly weapon.