Major General Muhammadu Buhari (retd.) has expressed condolences to former First Lady Marayam Abacha and her entire family on the death of their son, Abdullahi.
Gumsu Abacha, his sister, revealed his death in a tweet on Saturday.
Abdullahi died in his sleep, she claimed.
Garba Shehu, the Senior Special Assistant to the President on Media and Publicity, made the announcement on Saturday.
"The President's prayers and thoughts are with the Abacha family as they mourn the passing of the young Abdullahi," Buhari said.
"The President prays for the repose of the deceased's soul and comfort for those in mourning."