A suburban Illinois man died in what police called a "freak accident" early Saturday, tumbling out of a moving party bus while attempting to turn up the radio.
The 27-year-old man was on the bus as it headed northbound on I-294 near Lake Cook Road in Northbrook at about 3 a.m., Illinois State Police said in a release.
He was trying to turn up the radio volume when, authorities said, he fell down the stairs and through the bus doors. He then fell onto the expressway and an unknown car struck him, according to police.
The man, from Libertyville, was pronounced dead at the scene, officials said.
The Cook County Medical Examiner’s office did not immediately confirm the fatality, and further details, including the victim’s identity, were not available.
No foul play is suspected, according to Illinois State Police, who are searching for the driver of the car that struck the man for questioning.
Authorities were unsure if any criminal charges would be filed in connection with the incident.
The two right lanes of northbound I-294 were closed following the crash, but reopened several hours later.
The investigation remains ongoing, according to police.