The son of former federal politician Bob Baldwin has been reported missing to police.
Robert Baldwin, 28, lives in Adelaide with his wife.
Bob Baldwin told the Newcastle Herald on Friday morning that his son had not been seen by his wife, and that he had not contacted her or his family, since leaving home at 7am on Thursday.
Mr Baldwin said the behaviour was out of character and the matter had been reported to South Australian Police.
Robert Baldwin's family have shared posts on Facebook seeking information about his whereabouts.
"Have you seen my son Rob, he went missing in Adelaide yesterday," the former politician posted on Facebook on Friday.
Mr Baldwin served as the federal member for Paterson, based in the Hunter, until 2016, representing the Liberal Party.
He served in the ministry of both the Howard and Abbott governments, including roles as Parliamentary Secretary to the Minister for Industry, Tourism and Resources, Minister for Industry and Minister for the Environment.
In opposition he held positions in the shadow ministry, including spokesman for defence, science and personnel, regional development and tourism.