Housemate arrested amid missing girl investigation

A housemate of missing teenager Pheobe Bishop has been arrested over the 17-year-old's "suspicious" disappearance.

James Wood, 34, has been taken into custody, almost three weeks after Pheobe missed a flight and vanished in southern Queensland.

Pheobe was last seen near Bundaberg airport about 8.30am on May 15 after booking a trip to Western Australia to see her boyfriend.

CCTV footage indicated Pheobe never arrived at the airport terminal, police said.

Police on Wednesday said a man was in custody but no charges had been laid.

"A 34-year-old man ... is assisting police with enquiries as part of ongoing investigations into the disappearance of Pheobe Bishop," a statement said.

Police earlier on Wednesday said they had scaled back their search for Pheobe after combing the Gin Gin area where the teenager lived with Wood and a woman on a property.

The Gin Gin property near Bundaberg and a grey Hyundai ix35, thought to have been used to take Pheobe to the airport, were declared crime scenes soon after her disappearance.

Wood and Pheobe's other housemate Tanika Kristan Bromley have since been charged with weapons offences.

Bromley was granted bail at Bundaberg Magistrates Court to reappear on June 23 while Wood was issued a notice to appear on June 13.

Police said the weapons charges were unrelated to Pheobe's disappearance and there was no suggestion Bromley or Wood were involved.

Pheobe's mother Kylie Johnson has been pleading for information since her daughter's disappearance, documenting her family's heartache on social media.

In her latest post Ms Johnson wondered if her life would be the same.

"Starting day 20 with you still missing Pheobe," she posted on Facebook on Wednesday.

"I don't know if life will ever be the same again? I don't know if I will ever look at the world the same way that I did before May 15th.

"What I do know is that people have information on where you are Phee and we need that reported to police."

In a video statement released by Queensland Police at the weekend, Ms Johnson said she still held onto hope but had to consider the possibility her daughter wasn't coming home.

"This is a pain no person or family should ever have to experience," she said.

The police search initially focused on Good Night Scrub national park, an hour's drive from Bundaberg airport, with homicide detectives, cadaver dogs and divers called in.

Some items believed to be linked to the investigation were seized for forensic examination.

The search revealed evidence might have been moved from the national park before police arrived.

Police then focused on Gin Gin where Pheobe lived with Wood and Bromley.

The community rallied around the missing teen's family during the search with the "Leave the Lights On for Pheobe" campaign.

Gin Gin locals posted photos on social media of their front lights switched on "to guide Pheobe home".

Anyone with information, footage or sightings of the grey Hyundai between May 15 and May 18 in the Gin Gin area has been urged to contact police.

Pheobe is about 180cm tall with a pale complexion, long hair that has been dyed red and hazel eyes.

She was last seen carrying luggage, wearing a green tank top and grey sweatpants.