The mother of missing Queensland teenager Pheobe Bishop shared another heartbreaking update on her disappearance.

The message from the 17-year-old’s mum comes as the search for the girl enters day 11, with concerns growing for her safety.

Kylie Johnson said, in a Facebook post, “our hearts are shattering more and more each day” as the search for her daughter escalates.

“As we enter day 11 of Pheobe still not being home our numbness to our tears, to our hearts breaking and this hell is heavy.

“Not knowing what to say, what to do or even how to continue to live in this cyclone of uncertainty. The tears come, the anger and frustrations come and most of all our hearts are shattering more and more each day.

“Your little man/brother asked yesterday, ‘Why won’t Phee take our calls? She always takes our calls!’

“Mate I wish I knew but we have to believe that the police and the lights that our amazing community are leaving on will going to bring her home to us.”

On Saturday, emergency crews conducted a land, water and aerial search in a patch of bushland for the 17-year-old.

Fire and Rescue teams flew a drone over the Good Night Scrub National Park just outside of Gin Gin, in the Bundaberg region, an hour away from where Pheobe was last seen.

Police divers carried out waterway searches of the Good Night Scrub area but did not find any items of interest.

Officers also appealed for members of the public who may have seen a grey Hyundai ix35 in the Good Night Scrub National Park on May 15 to come forward.

Last week, a grey Hyundai ix35 belonging to Pheobe’s housemates was seized by police and declared a crime scene.

Police have not confirmed whether they are searching for footage of that same vehicle in the park.

The homicide squad is assisting in the search, but police say they are still holding out hope that Bishop is alive.

Pheobe was last seen on Thursday, May 15, by her housemates, who say they dropped her off outside the Bundaberg Regional Airport at 8.30am.

She had a ticket to fly to Western Australia, via Brisbane, to visit her boyfriend, but she never entered the terminal or checked in for her flight.

There has been no confirmed sighting of Pheobe or her luggage since then.

Pheobe is described as about 180cm tall, with pale complexion, long dyed red hair, and hazel eyes.