A deadly multivehicle crash shut down I-75 in Cobb County for more than five hours Wednesday morning.

Wreckage spilled across all southbound lanes, prompting authorities to close the interstate between the north and south Marietta Parkway loop from 2 until 7 a.m. Four vehicles were involved, including two tractor-trailers, according to Marietta police.

Traffic investigators believe a collision between a black Infiniti G37 sedan and a silver Chevy Silverado pickup truck set off a chain reaction, causing a passenger in the back seat of the pickup to be ejected. The passenger, a 54-year-old man, was killed.

He is not being identified until his family is notified of his death.

According to police, the first collision caused the Infiniti and the Chevy to lose control and sent the truck into a guard rail just before the North Marietta Parkway exit. The Chevy deflected back into the travel lanes, where it was hit by two passing tractor-trailers.

No one else was taken to a hospital. All the drivers involved in the wreck are cooperating with the investigation, as well as a few witnesses, Marietta police spokesman Officer Chuck McPhilamy said.

“The roadway remained closed for several hours due to the size and scope of the crash,” he said in a news release. “Fluids from the involved vehicles covered all lanes of southbound I-75 and had to be cleared before the road could be reopened.”

The cause of the initial collision is still under investigation. Anyone with information is asked to contact Marietta police traffic investigators at 770-794-5352.

In other news: 

Channel 2's Michael Seiden reports.