The operation to separate the Jordanian Siamese twins, Mohammad and Amjad, began at King Abdulaziz Medical City of the National Guard here today. Custodian of the Two Holy Mosques King Abdullah bin Abdulaziz Al Saud ordered the operation at his own expense. The operation is expected to continue for about 7 hours. The operation is being performed by the specialized Saudi surgical team led by Minister of Health Dr. Abdullah bin Abdulaziz Alrbea'ah.