The wife of Nigerian President Olusegun Obasanjo has died after undergoing surgery in Spain.

A Nigerian government spokesman announced the death of 59-year-old Stella Obasanjo Sunday, but gave no further details.

Diplomats in Spain say Mrs. Obasanjo was on a private visit to Spain when she died Sunday morning at a hospital in the southern resort city of Marbella.  Reports say an autopsy will be performed on her body before it is returned to Nigeria.

Spanish media say Mrs. Obasanjo had undergone an unspecified procedure at a private facility called "The Molding Clinic." She was later rushed to a hospital in Marbella.

Some information for this report provided by AP and Reuters.