A bike left at the start of a tramping track on Great Barrier Island has police worried someone might be missing in the bush.
It's been at the beginning of Palmers Track on Aotea Rd since at least Monday, police said on Friday. Enquiries by police and Department of Conservation as to who owns the bike have come up empty.
"We are really keen to urgently locate the bike owner to ensure they are safe and well," said Insp Beth Houliston.
Police have started a search and rescue operation in case there is someone lost on the island, located about 100km northeast of Auckland.
"If you own this bike or if you know someone who does then please get in touch," said Houliston.
Police can be contacted on (09) 302 6640, or via the Auckland City District Police Facebook page.