$15,000 reward to find hiker

Relatives of the bushwalker missing in Kosciuszko National Park have offered a $15,000 reward for any hiker who finds him alive.

Canadian student Prabhdeep Srawn, 25, was last seen when he parked his rental car at the Charlotte Pass Village on May 13.

The car was due to be returned on May 15.

Ohio-based relative Tej Sahota used Twitter on Saturday to urge private hikers to join the search in the area.

Dr Sahota, who is married to Mr Srawn's cousin, said on the site he had been in contact with family members in Australia.

''Find Prabh … get $15,000. easiest money you'll make hikers!'' he tweeted.

But NSW Police said specially trained and equipped personnel were involved in the hunt for Mr Srawn and that they were not seeking assistance from members of the public.

They were still treating the operation as a search and rescue and were to resume the hunt for Mr Srawn at 7.30am on Sunday.

NSW Police said they believed Mr Srawn had intended to walk from Charlotte Pass Village to Mt Kosciuszko and then to another unknown destination nearby.

On Saturday police and emergency services crews concentrated their search efforts on the north-western side of the main range, including the flat at Moira and around the Geehi River.

Teams searched the western face of Mount Kosciuszko and ground crews looked between Charlotte Pass and Blue Lake.

Dr Sahota was not able to be contacted on Saturday.

His family have launched a social media campaign to help find Mr Srawn and previously pleaded for Australian Defence Force troops to join the rescue efforts, but NSW Police said adequate resources had been committed to the search.

Mr Srawn's cousin Ruby on Friday posted a video online pleading for more assistance in the search for him.

''Please tell the local government of New South Wales to send more troops out, to get more manpower on the ground, because if anyone is still up there waiting to be found, it is my cousin Prabh,'' she said.

''He is out there, his voices [sic] have been heard, recently his water bottle has been found on a trial, he's there somewhere.''

On a Facebook page titled ''Help, Find Prabh Srawn'', a user on Saturday posted a copy of a letter dated May 23 from the World Sikh Organisation of Canada to Canadian Prime Minister Stephen Harper, asking him to encourage the Australian authorities to increase the search efforts for the missing man.

Mr Srawn is an armed forces reservist and a Bond University law student. His sister Mandeep Srawn previously told the Sunday Canberra Times he had been trained to survive in temperatures as cold as minus 15 degrees.

The story $15,000 reward to find hiker first appeared on The Sydney Morning Herald.

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