Shots have been fired at a business in the Geraldton suburb of Webberton, leaving one person injured.
Police are investigating after shots were fired at the Flores Street business at 12.20pm.
Officers are now searching for 48 year old Rodney Peter Vlahov, who they say should not be approached.
It's believed Mr Vlahov is driving a white Land Cruiser with the registration 1BBO-343, and he may be heading towards the Chapman Valley, north-east of Geraldton.
He's described as fair skinned, about 175cm tall with a medium build, brown hair and blue eyes.
Police say he may be armed and anyone who spots him should call police on 131 444.