Thirty-three passengers on a tour bus from Chicago were injured Sunday afternoon when it crashed in Green Bay, Wisconsin.The bus, headed to a casino in Michigan, was carrying 54 people when it exited northbound Interstate 43 about 2:45 p.m., crossed the roadway and went over an embankment, according to Green Bay authorities. At least two people were critically injured.Injured passengers were taken to one of four local hospitals. Others were taken to a Salvation Army community center.The cause of the crash was under investigation late Sunday. The Wisconsin State Patrol was probing whether the bus experienced mechanical issues, and Green Bay police were determining whether the bus driver would face potential citations or charges. ...read more read less