(CNN) -- Five occupants of a church van were killed when it crashed Monday morning in Vandalia, Illinois, according to Deputy Shawn Carter with the Fayette County Sheriff's Office.
According to a preliminary report from the Illinois State Police, the 15-passenger van was headed east on Interstate 70 when it veered off the roadway and flipped several times. Several occupants were ejected from the van.
There were 11 men in the one-vehicle crash. The other six passengers were transported to hospitals. Their conditions are unknown.
Why the van left the highway is still under investigation, the state police said.
CNN's Carma Hassan contributed to this report