The youngest son of late Egyptian President Mohamed Morsi died of an alleged heart attack at a hospital in Cairo, sources told Al Jazeera.
Abdullah Morsi, who was in his mid-twenties, died on Wednesday at the Oasis hospital in Giza in the southwest of the capital, the sources said.
A Morsi family source confirmed his death to Anadolu Agency without giving further details.
Egypt's health ministry has yet to comment on his death.
Mohamed Morsi, Egypt's first democratically elected president, died on June 17 while standing trial for charges that he and legal observers said were politically motivated.