Kathmandu: The sudden and unexpected death of former prime minister Sushil Koirala earlier this week has sparked a controversy in Nepal, giving rise to questions in the media like why his illness was kept in the dark and why was he not taken to a hospital for treatment.

Nepal's major dailies on Thursday -- a day after Koirala, 76, was cremated with state honours on the bank of the holy Bagmati river -- raised several questions related to his death and dragged Koirala's personal doctor and aides in the controversy.