MENOMONEE FALLS, Wis. (CBS 58) -- Menomonee Falls police are investigating a fatal crash that occurred on Friday evening, Jan. 29.

Police say around 6:44 p.m., first responders reported to a crash near I-41 and County Line Road. 

It was discovered that a single vehicle was traveling south on I-41, struck the median wall and rolled over. 

The driver and sole occupant, a 49-year-old Milwaukee man, was pronounced dead at the scene.

Police say the cause of the crash is unknown and remains under investigation. 

Southbound I-41 from County Line Road is currently closed.