Police say they pulled over two speeding vehicles on Brand Highway, near Mingenew, about 7.30pm (WST).
Police say none of the occupants were able to provide proper identification and were detained under the Immigration Act.
Three Malaysian men, a Vietnamese woman and her five-month-old child were taken to Geraldton Police Station.
Sergeant Grant Rosman says police will be handing over the investigation to immigration authorities.
“Immigration Department have now taken over that investigation and looking at their validity to be in Australia,” he said.
Police allege the Vietnamese woman had been illegally working at a plantation in Carnarvon.
11:45 a.m. Framingham Police Lt. Ron Brandolini said no arrests have been made in Saturday night’s shooting.
Framingham Police responded to a report of gun shots at 113 Second St at 11:30 p.m. Saturday night, according to the Framingham Police log.
Initial scanner reports had the gun shots coming from two houses on Second Street.
The Scanner also reported that two dark-skinned males wearing hoods ran towards the Carlson Road area.
Framingham Policce were using the K-9 unit last night.