The 86-year-old King Abdullah has been suffering from back pain because of the clot, the unnamed official told CNN. The king is set to be in the United States Monday.
Meanwhile, Saudi Crown Prince Sultan bin Abdulaziz al-Saud was on his way back to Saudi Arabia from Morocco, and would arrive before the king departs, a Saudi Information Ministry spokesman told CNN.
Saudi Arabia's official news agency SPA said Sunday that King Abdullah was flying to the United States for treatment of a herniated disc in his back and a "blood accumulation" near the disc.
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