Police spokesman Sgt. Sammy Morris says the child and the woman died at hospitals after the crash Thursday night.
The woman was identified as 29-year-old Sharice Swain, of Cleveland. Her death is being investigated as a homicide.
The child’s name hasn’t been released.
It’s not clear how and why the woman was stabbed. Officers are investigating the crime scenes in a mostly residential area a few miles southeast of downtown Cleveland.
Police say another woman was taken into custody, but there is no word on any charges.