Search for missing man in WA's south

A search is under way for a 32-year-old man who went missing from a hospital in Western Australia's south.

Three SES units from Australind, Bunbury and Collie have joined the search for Kyle Spragg, who was last seen at Bunbury Regional hospital on Sunday night.

A police spokeswoman said there were serious concerns for the welfare of Mr Spragg, who is described as 183cm tall, of medium build and fair hair.