Police have commenced a search for motorists reported overdue late last night after travelling in the Camooweal area.
On March 11 a white Holden Colorado with seven people left Mount Isa intending to travel along the Old May Downs Road through Camooweal to Lake Nash in the Northern Territory.
The group consists of five adults aged 27 to 33, including a pregnant woman, and two children, under the age of six.
The alarm was raised when the vehicle failed to arrive at Lake Nash.
Two vehicles left Lake Nash today, each containing three to five people, searching for the missing vehicle but they have also not returned.
It is believed they may have all become stranded around 100km South of Camooweal due to heavy rain in the area.
A search involving helicopters and fixed wing aircraft commenced today with the area inaccessible by road.
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.
Crime Stoppers is a registered charity and community volunteer organisation working in partnership with the Queensland Police Service.
For all non-urgent police reporting or general police inquiries contact Policelink on 131 444 or Policelink.qld.gov.au 24hrs a day.