An Irish woman is fighting for life and a British woman has died after a light plane crash in Australia.
The Irish woman, aged 21, sustained head injuries in the accident and was rushed to hospital.
"[She] was flown to Rockhampton Base Hospital and later transported to Brisbane for treatment of a head injury, where she remains in a critical condition," Queensland Police said in a statement.
The women, were among four people on the aircraft when it came down at around 11am on Tuesday on Middle Island, near Agnes Water, in Queensland, local police said.
The pilot, a man aged in his sixties, was taken to hospital in a serious condition and a 13-year-old boy was transferred to be treated for minor injuries, the Bundaberg RACQ LifeFlight Rescue helicopter team said.
Those involved are believed to have been tourists taking a day trip to the island.
"We are aware of the case and we are providing consular assistance," a Department of Foreign Affairs spokesperson said.
It is understood that the teenage boy involved in the crash is local.
Aviation authorities will now take over the investigation and determine the cause of the crash.
"Anyone with information which could assist with this matter should contact Crime Stoppers anonymously via 1800 333 000 or crimestoppers.com.au 24hrs a day," police said in a statement.
Local media are reporting that paramedics fought to save the deceased woman's life for an hour before she died at the scene.
The plane belonged to a tour company called 1770 Castway, which offers adventure tours.
The tour company expressed sympathy with the family in a post on it's Facebook page.
"On behalf of everyone at 1770 Castaway, we offer our deepest condolences to the families and all the loved ones of those involved in the Middle Island tragedy," the company said.
"In respecting the due process of several investigations and in not wanting to preempt the outcome of those inquiries, we cannot offer any comment regarding the circumstances of the accident and we would ask that the privacy of all concerned be respected at this very difficult time.
"1770 Castaway is offering all the investigators its full co-operation. Thank you."
ABC news has reported that a second plane was also flying in the area when it saw the plane go down. The second aircraft landed and called for the emergency services.
Bystanders attempted to help the victims of the crash and performed CPR on those involved until authorities arrived.
LifeFlight, a rapid response rescue crew, issued the follow statement after attending the scene of the crash.
"The LifeFlight helicopter was tasked to Bustard Head just after 11am by the Queensland Police Service to help search for the Cirrus SR22 single-engine aircraft which crashed with four people on board.
"The wreckage was located a short time later and the LifeFlight helicopter landed on the beach nearby to assist treating the pilot and passengers. The area where the plane was found is only accessible by boat or aircraft.
"The RACQ LifeFlight Rescue helicopter medical crew treated and transported the pilot of the SR22 - a male in his 60s - to Bundaberg Base Hospital suffering multi-trauma injuries.
"He was transported in a serious condition.
"Sadly one person was declared deceased at the scene. Two other survivors were airlifted by another air-medical operator to Rockhampton Hospital for further treatment.
"The occupants were tourists who were reportedly camping on the island," the statement added.
Additional reporting by Press Association