Hundreds of community members have come together to search for a missing teenager who disappeared from Darwin's rural area four days ago.
Police said 18-year-old Seth Puckridge was last seen at his home near Ridley Road, in Herbert, last Thursday night.
Organisers said about 250 people have participated in the search for Mr Puckridge, in the Humpty Doo and Herbert areas.
"We've had people on foot, buggies, quads," community organiser Naomi Blewit said.
Disappearance 'unexpected'
A Facebook group set up by the family to assist in the search for Mr Puckridge has gained more than 1,500 members.
"It's obviously very distressing for all family members involved," family friend and local resident Shay Carter said.
NT Police have described Mr Puckridge's disappearance as "unexpected", and today said they held "serious concerns" for his welfare.
"Police received reports of several possible sightings of Mr Puckridge, but he has not yet been located," Detective Acting Senior Sergeant Paul Morrissey said.
"We encourage residents to search the grounds of their properties and report anything unusual."
A range of resources have been deployed for the search, including the mounted police unit, helicopters and motorcycles.
At the Humpty Doo supermarket where Mr Puckridge works, his colleagues told the ABC they had last seen the teenager on Wednesday and were concerned when he failed to turn up to work on Thursday.
"Everybody that has commented on social media that has seen that he is missing has said 'he was our favourite checkout person'", community organiser Naomi Blewit said.
Authorities have urged anyone with information of Mr Puckridge's whereabouts to contact police.
