A man who allegedly killed a colleague at an Australian grain silo is in a critical condition after turning the gun on himself, police said.
The 25-year-old shot a man in his 40s at the silo in the town of Kellerberrin at about 8.40am (12.40pm NZT) and then fled the area, the Western Australia Police Force said.
The police force issued an active shooter alert to warn members of the public to remain indoors as a search for the suspect got under way.
The gunman was believed to be armed, dressed in camouflage clothing and on the move north of the town, about 200km east of Perth, police said.
A suspect was eventually located in a farm paddock about 20km from Kellerberrin, Western Australian Police Regional Commander Rod Wilde said. He was airlifted to a hospital with serious injuries, Wilde said.