Richland County authorities are searching for a missing woman who may be at risk because of a serious medical condition.

Sheriff Leon Lott says 57-year-old Miltoretta Whitaker was last seen about 5 a.m. Friday when she walked away from her residence in the 460 block of Marsh Pointe Drive near Lake Carolina.

The sheriff says Whitaker does not have medicine with her, yet she requires insulin twice daily.

Whitaker is described as a black female, 5'2”, 220 pounds, with black hair and brown eyes.

She was last seen wearing a pink sun dress, a dark jacket and black boots.

Anyone with information on her location is asked to call 911.