MILWAUKEE (CBS 58) -- The Milwaukee County Sheriff's Office is investigating after a man jumped off the Silver Spring Drive overpass over Wisconsin Highway 145.

The incident happened Saturday around 10:41 a.m. Deputies and the Milwaukee Fire Department found the man unresponsive on the highway.

The Milwaukee County Medical Examiner's Office also responded to the scene and pronounced the man dead.

Because of the emergency response Highway 145 southbound were closed until about 1:20 p.m.

Anyone who witnessed the incident is asked to contact authorities.