NORMAN, Oklahoma - A woman is in critical condition following a single-vehicle crash in Norman.

According the Oklahoma Highway Patrol, the crash occurred around 10:40 a.m. Friday, April 20, when vehicle driven by 39-year-old Shannon Mitchell, of Edmond, was traveling southbound on Interstate 35 at Lindsey Avenue when it departed the roadway for unknown reasons. The vehicle then struck a bridge wall and re-entered the roadway, rolling a few times.

According to the report, Mitchell was not wearing her seat belt and was ejected. She was transported to OU Medical Center in Oklahoma City in critical condition.

OHP says the cause of the crash is under investigation.