An accident involving the Dallas Cowboys team bus left four people dead. (Barry White/KTNV via The AP)

A bus carrying Dallas Cowboys staff members to a fan event in Las Vegas collided with a van Sunday on a highway about 30 miles north of Kingman, Ariz., killing four passengers in the van. The passengers on the bus, which wasn’t carrying any Cowboys players, suffered only “bumps and bruises,” a team spokesman told the Associated Press.

Emery Tyler, the Cowboys’ longtime bus driver, told Yahoo’s Eric Edholm that the passengers aboard the Elegant Lady bus were shaken but otherwise unharmed. A spokesman for the Arizona Department of Public Safety told the Fort Worth Star-Telegram the crash still is under investigation but is not believed to be Tyler’s fault, adding that the van was making a left turn when the crash occurred.

“It’s a scary thing,” Tyler said. “I am sorry, I can’t talk about what happened. It’s a very unfortunate thing that happened.”

DallasCowboys.com columnist Mickey Spagnola, the team’s mascot and its videographer were on the bus, which was making promotional stops on its way from the Dallas area to Oxnard, Calif., where the team’s training camp begins Friday. The bus was scheduled to be in Las Vegas on Sunday evening for a now-canceled event involving 50 to 75 fans, the AP reports.