The search was conducted after the 21-year-old went missing in Kanangra-Boyd National Park near Oberon on October 20.

Mr Simonian was last seen by his parents and, despite a call for witnesses to come forward, the young man has not been seen since.

But Chifley Local Area Command Inspector Colin Cracknell said the discovery of camping items at his parents’ home did not mean Mr Simonian had forgotten to take them.

“We found hiking shoes and a backpack ... at the residence, but that’s not to say he doesn’t have two sets,” he said.

Inspector Cracknell said the young man’s parents reported no food had been taken from the family home. “Just because there’s no evidence of food being taken from his home, doesn’t mean he didn’t purchase any,” he said.

“We also seized his computer to see what areas he’s been searching so we can narrow down our search.”

Police have also searched the missing man’s car after it was discovered in the Kanangra Walls Road car park, but Inspector Cracknell said they found nothing of concern and the car did not look like it had been tampered with.

It has almost been two weeks since Mr Simonian [pictured] went missing, yet police and emergency service are continuing the search in the national park.

“We’ve pretty much searched everywhere that has readily accessible water,” Inspector Cracknell said. “Police are perplexed that with all the activity in the area, he hasn’t made himself known.

“We have grave fears for his safety.”

Mr Simonian is described as being about 180cm tall, with a thin build, olive skin, short black curly hair and brown eyes.

Anyone with information about Mr Simonian’s whereabouts is urged to come forward.

Police have also asked members of the public who may have seen Mr Simonian or his car between Tuesday, October 21 and Friday, October 24 to come forward.

His car, which has since been towed by police, is a white 2006 Ford Falcon station wagon with registration number BR 45 HY.

If you have information, call Oberon Police Station on 6336 1000 or Crime Stoppers on 1800 333 000.