Jireh D. Williams, 21, of Buffalo, has been identified as the passenger killed in the early morning Sunday motor vehicle crash at the ramp to the Kensington Expressway near Elm Street, police said today.

Williams, a back seat passenger, was thrown from the vehicle just before 3:30 a.m. when it struck a guard rail and a tree before coming to rest on some nearby grass. Police accident investigators are continuing to probe the cause of the crash, which may have involved speeding.

The driver of the vehicle and another passenger were taken to Erie County Medical Center, where they were treated for “non-life-threatening injuries,” according to police.