A man and boy were critically injured, and another boy had his surfboard bitten during three separate shark attacks in Sydney, Australia in just over 24 hours, police confirmed Monday. Big picture view: A man, believed to be in his 20s, was in a critical condition Monday after being bitten by a shark at Sydney's Northern Beaches on Jan. 19. At 6.20 p.m. local time, emergency services were called to North Steyne Beach, following reports of a surfer being bitten by a shark