At least two people were killed and 41 people were hospitalized after a charter bus drove off a North Texas highway and flipped on to its side on April 11.

The Cardinal Coach Line bus was transporting senior citizens when all-of-a-sudden it drove across a busy highway, hit two concrete barriers, and tipped over in the center of the media according to a nearby witness.

"It was pretty bad, people screaming," said Ed Cluck, who stopped after driving by the wreck and seeing smoke according to the Associated Press. "It was just people stacked on top of each other."

The bus was carrying 45 people and was on its way to a casino in Oklahoma according to the Associated Press.

The cause of the crash has yet to be determined.

Cardinal Coach has reported no accidents in the last two years that resulted in deaths or injuries, according to the Federal Motor Carrier Safety Administration. A man who answered the phone at the company's offices in Mansfield, just south of Dallas, confirmed that one of its five buses was involved in the crash but said he was still trying to gather information about the incident.

"It's just a lot of injuries, a lot of people in shock, broken bones," added Robert Hare, another motorist who stopped to help. He said many passengers were crying and appeared to be in shock as they were pulled from the wreckage.

A spokesman for Baylor Medical Center in Irving said 13 patients arrived at the hospital following the accident. Officials at Las Colinas Medical Center in Irving confirmed that six patients were there. Approximately 15 patients were taken to Parkland Memorial Hospital, including the bus driver, and another victim was airlifted in critical condition, hospital officials said.

Public transportation buses with Dallas Area Rapid Transit were used to transport some passengers with lesser injuries according to the Associated Press.

"We ended up swirling and weaving and then ended up on the side," said Daniel Risik, 73, told The Dallas Morning News. "People were screaming and hollering, a very traumatic situation to say the least."

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