A beanie believed to have belonged to Luke Shambrook has been found on the fourth day of the search for the missing 11-year-old . Victoria Police have confirmed it was located on Monday afternoon , west of the Devil ’ s Cove and Candlebark campsite in Lake Eildon National Park - north-east of Melbourne . They are unsure when the beanie was dropped as the search for Luke continues . Scroll down for video . The Shambrook family with children ( left to right ) Luke , 11 , Lauren , 7 , and Matthew , 10 . 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 remain hopeful they will find the boy who went missing from the campsite on Friday . An increased number of police and other emergency crews continue to scour the thick bushland areas around Lake Eildon . On Sunday , search co-ordinator Acting Senior Sergeant Andrew Walker said Luke had a 'very high pain tolerance ' , a factor that would work in his favour given he has now been missing for days . 'Hence the reason why we ’ re out searching . We ’ re still hopeful that we can find him , ' Sgt Walker said . The 11-year-old , who is autistic , 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 . A Victorian Police spokeswoman told AAP late on Sunday a family saw a young boy matching Luke 's description while they were driving in the Devils River vicinity . A renewed sense of urgency has gripped the search efforts for the 11-year-old as temperatures have been dropping as low as eight degree Celsius in the area . The Candlebark Campground in Fraser National Park , central Victoria , where Luke went missing on Friday . 'The advice I 'm getting from our search and rescue experts having regard to the overnight temperatures and the daytime temperatures is that he could well still be out there , ' Sgt Walker said on Sunday . 'We 've got to be realists but we 're positive , the family 's positive . ' But Luke 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 . A large search is being carried by a medley of search and rescue teams . Lake Eildon , near where Luke went missing : Police say conditions are favourable for his survival overnight , with warm temperatures through the day . Sergeant Greg Paul said the search was focused on an area of several kilometres of bushland . Campers are helping rescue teams including the air wing , dog squad , local police and SES volunteers in the search of thick bushland . Police hold hope Luke has been able to stay reasonably warm as he was last seen wearing a beanie and warm jacket . Having met Luke 's family during a push to open a special school in Melbourne 's south-east , Opposition emergency services spokesman Brad Battin says it is devastating to hear the 11-year-old is missing . He said Luke 's parents Tim and Rachel had been updating him on the search and appreciated 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 . ' 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 . 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 , 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 . 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 .
mark Shambrook was last seen leaving Candlebark Campground on Friday . 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 . police remain hopeful they will find mark , who has ' high pain tolerance ' and has limited speech and his doctor 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 him and his surroundings .