The embattled former Minister of Petroleum Resources, Diezani Alison-Madueke has not been seen in Nigeria since she jetted out of Abuja on the same London bound flight as Buhari on May 23rd. She is undergoing a new round of treatment for breast cancer, according to a family source knowledgeable about her condition.

SaharaReporters reports that Mrs. Alison-Madueke is currently in a hospital in London where she started a fresh round of therapy on Friday. The treatment was described as a daily therapy that will last for one week, said the source. Mrs. Alison-Madueke left Nigeria on May 23 and has not returned to Nigeria since that trip.

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The source also disclosed that Mrs. Alison-Madueke, underwent surgery last year to remove tumors from her breast.