Water police have been called in to help with the search of a missing autistic boy , as 11-year-old Luke Shambrook is 'fascinated ' by water but can not swim . Luke has been missing for two nights in a Victorian national park , with temperatures dropping to as low as eight degree Celsius on Saturday night . However , he may not even know he is lost and is known to frequently hide , according to his family . He was last seen leaving Candlebark Campground in Fraser National Park near Lake Eildon at 9.30am on Good Friday . According the Herald Sun , the 11-year-old was reportedly seen walking near the Devils River on Sunday , four kilometres south of his campsite where he was last seen . Search crews have rushed to the location and police remain comfortable that the young boy is still alive . Luke has limited speech and his family says he is probably confused , and he may not even be aware he is lost . Campers are helping rescue teams including the air wing , dog squad , local police and SES volunteers in the search of thick bushland . Scroll down for video . Luke Shambrook was last seen on the national park at 9.30am on Good Friday . It is understood he wandered off and has not been seen since . Police assume Luke has spent 36 hours without food or water and on Saturday night would have experienced temperatures as low as 8 degree Celsius . Police hold hope that Luke has been able to stay reasonably warm as he was last seen wearing a beanie and warm jacket . There was a moment of hope when a beanie was found by the search party , however it was decided it did not belong to Luke . Having met Luke 's family during a push to open a special school in Melbourne 's southeast , Opposition emergency services spokeman Brad Battin says it 's devastating to hear the 11-year-old is missing . He says Luke 's parents Tim and Rachel have been updating him on the search and appreciate the efforts of all those out looking for their little boy . 'He 's a lovely young kid , ' Mr Battin told AAP on Sunday . 'He displays all the characteristics of a child with autism , which means he might not even think he is lost . ' Sergeant Greg Paul says the search is focused on an area of several kilometres of bushland . The Candlebark Campground in Fraser National Park , central Victoria , where Luke went missing on Friday . 'We 've got a lot of searchers in the bush , we 've got a lot searchers searching all the tracks and in between the tracks and the gullies and the spurs , ' he told reporters on Saturday . The Shambrook family has thanked emergency service workers , volunteers , family and friends for their help . They say the disappearance is completely out of character for him . A widespread search is being carried by search and rescue teams including the air wing , dog squad , local police and SES members , along with campers around the surrounding areas . A large search is being carried by a medley of search and rescue teams . Sergeant Greg Paul said the search was focused on an area of several kilometres of bushland . 'We 've got a lot of searchers in the bush , ' he told reporters on Saturday . 'We 've also got people walking the banks of the lake . ' But he outlined a serious hurdle for the search efforts , according to ABC . 'With the autistic condition , Luke might not respond to searchers , he may not even know that he 's lost , ' he said . 'He wo n't necessarily respond to his name being called , but that might change a little bit as he gets hungry maybe . Lake Eildon , near where Luke went missing : Police say conditions are favourable for his survival overnight , with warm temperatures through the day . Sgt Paul said there were hundreds of other campers in the area over the busy Easter period , so there was a chance someone else could spot Luke . Luke is described as being of medium build , about 150 cm tall with olive skin , brown hair and brown eyes . He was last seen wearing a black windcheater , black t-shirt , grey track-pants , grey boots and a scarf . Sergeant Greg Paul said the search was focused on an area of several kilometres of bushland . Searchers are desperately combing bushland and the banks of a lake for an autistic who went missing there . A widespread search is being carried by search and rescue teams including the dog squad and local police .
Luke Shambrook was last seen leaving Candlebark Campground on two nights . The 11-year old was camping in the Victorian national park with his family . He has been missing for Friday and temperatures dipped to as low as eight degrees Celsius on Saturday night . There has been an unconfirmed sighting of Luke with police acting quickly . The 11-year-old was reportedly seen walking 4 kms from his campsite . Luke has limited speech and his family says he is probably confused . A large search is being carried by a medley of search and rescue teams . Police also said conditions are favourable for his survival overnight . They have issued an extensive description of Luke and his clothing .