Crown prince recovering after treatment in New York for an undisclosed illness . The crown prince, who is the son of King Salman, has been under a travel ban since last year and was forced to cancel several trips abroad this year. Has been convalescing at his residence in the Moroccan city of Agadir . In April , King Abdullah named the interior minister , Prince Nayef -- the powerful brother of the crown prince and half-brother to the king -- to the post of second deputy prime minister . Saudi officials have maintained publicly that Sultan 's health has improved .
Crown prince recovering after treatment in New York for an undisclosed illness . The crown prince, who is the son of King Salman, has been under a travel ban since last year and was forced to cancel several trips abroad this year. Has been convalescing at his residence in the Moroccan city of Agadir . Saudi officials have maintained publicly that Sultan 's health has improved .