CINCINNATI (AP) -- The State Highway Patrol says the driver of a Greyhound bus that ran off an interstate and flipped over says he doesn't remember anything from the last mile before the crash that injured at least 35 people.

An investigation report released Thursday shows that 64-year-old driver Dwayne Garrett told police at the scene of the Sept. 14 accident in southwest Ohio that he had been drinking coffee, started coughing, then lost consciousness.

The report says several passengers reported seeing the driver slumped over the wheel before the early morning crash.

Garrett was cited for failure to maintain reasonable control, a misdemeanor. He declined comment Thursday.

The bus was carrying 51 passengers from Cincinnati to Detroit when it ran off Interstate 75. There were no life-threatening injuries.