Sydney, Jan. 20 -- Authorities have closed all beaches in northern Sydney following three shark attacks in two days that left two people with critical injuries.
All 20 beaches in Sydney's Northern Beaches area were closed until further notice from Tuesday, after two of the attacks occurred in the region on Monday.
A man aged in his 20s was hospitalized in a critical condition on Monday night after he was bitten on the leg by a shark while surfing at a beach in Manly, 10 km northeast of central Sydney in the Northern Beaches.
Earlier in the day, an 11-year-old boy escaped without injuries when his surfboard was bitten by a shark at Dee Why Beach, 5 km north of Manly in the Northern Beaches.
Photo analysis of the surfboard bite by the Dep...