Queensland police are assisting five people with an investigation into a triple fatality in Bogie in north Queensland.
Three people were found dead and a man was critically wounded after a shooting on the cattle property near Collinsville on Thursday morning.
The injured man, who was airlifted to Mackay Hospital with a gunshot wound to his abdomen, is in a serious but stable condition after undergoing surgery late yesterday.
The police said they were still trying to determine a motive for the shooting.
An emergency declaration was issued by the police under the Public Safety Preservation Act for an area in Shannonvale Road, south-east of Collinsville, which remains in place.
Multiple crime scenes have been established and residents have been advised to stay away from the area.
Mackay District Superintendent Tom Armitt said the people who died were believed to be known to the injured man, but police did not confirm their identities.
District Superintendent Armitt said police were searching an extensive farming area that is heavily forested and hilly.