Encrypted messaging service WhatsApp says it is working with authorities to help them locate missing Belgian backpacker Theo Hayez in Australia.
The 18-year-old's distraught father has pleaded for access to his son's account believing it could hold the key to his whereabouts.
NSW Police admit they are "baffled" by the disappearance of the young man, who was last seen leaving the Cheeky Monkey's bar in Byron Bay about 11pm on May 31 after earlier being captured on CCTV buying alcohol in a bottle shop.
His father Laurent Hayez arrived in the country last week and has appeared at Tweed Heads police station to beg the public for help, saying his son was "in grave danger".
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CLIP: http://fsnradionews.com/feeds/0617hayez-plea.mp3
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