( CNN ) -- Authorities have recovered human remains from a large crocodile that 's believed to have taken a man from his boat in Australia 's remote north . Rangers shot dead two saltwater crocodiles in the Northern Territory 's Kakadu National Park on Sunday after searching through the night for a 62-year-old man who was reportedly snatched at a waterhole on the South Alligator River the previous afternoon . One of the crocodiles , measuring around 15.5 feet ( 4.7 meters ) , contained human remains , police told reporters Sunday . A statement on the Northern Territory Police Force Facebook page said the victim 's body had been recovered and a report would be prepared for the Coroner . The man had been fishing with his son , wife and daughter-in-law when the incident occurred , Northern Territory Police Sgt . Andrew Hocking said . The victim 's family witnessed the attack but were unable to save him . With poor cellphone coverage across large parts of the remote region , the man 's wife and daughter-in-law drove two hours to alert authorities to the attack , according to the Northern Territory News . Police and park rangers searched the area with a helicopter and boats over the weekend , and found two large crocodiles about a mile ( 1.5 kilometers ) from where the man was last seen , according to Hocking . Police have not released the victim 's name . `` This is a tragic event and our thoughts are with the family during this very difficult time , '' said Commander Bruce Porter of the Northern Command . A crocodile expert , Grahame Webb , said it was unusual for the reptiles to attack at this time of year as they are rarely active during the cooler months , local media reported . `` They tend to move around a lot more when it warms up ... and that 's when they 're more dangerous , '' he said . The crocodile-infested waters of Kakadu National Park make it a notoriously hazardous area for humans . But most attacks involve swimmers , not people on boats , according to a study in the Wilderness & Environmental Medicine journal . In January , a 12-year-old boy was killed by a crocodile while swimming with friends in a waterhole near Mudginberri . Florida looking for crocodile response agents . Crocodiles hunt with sticks .
Man , this time of year , killed by crocodile in remote Australia . Police shoot two animals , find human remains in one measuring about a mile . Expert says crocodile attacks are unusual at 62 . Second deadly crocodile attack in Australia in 2014 .