An American surfer has been mauled by a two-metre (six-foot) shark off the Indonesian resort island of Bali, sustaining a serious arm injury, a doctor said Wednesday.  Ryan Boarman, in his 20s, was admitted to hospital in the west of the holiday island Monday shortly after being attacked by the shark as he surfed at Balian beach. While shark attacks are generally rare in Bali there have been several such incidents in recent years at Balian, a popular surfing spot.–AFP