An Oconomowoc woman was killed early Friday morning in a rollover crash on Highway 16 in the town of Ixonia, according to a news release from the Jefferson County Sheriff's Office.

Police said a 1993 Dodge Power Ram pickup truck was heading east on Highway 16 near Lang Road northwest of Oconomowoc when the driver failed to negotiate a curve, went into the median and rolled.

A 23-year-old woman in the truck was ejected in the crash and suffered fatal injuries, police said. A 21-year-old woman from Ixonia was injured and taken to Aurora Hospital.

The crash is under investigation.