PREMIER Campbell Newman and his wife Lisa have been targeted with a sickening Facebook threat to "slit their throats''.

Police swooped on a Caboolture home on Friday and arrested a 26-year-old man over the threat, made through a fake Facebook account.

The post on the Premier's official Facebook page on Wednesday warned the threat was serious and would be carried out.

ABUSIVE CALLS LEFT ON NEWMAN PHONE

The message also warned Mr Newman to protect his loved ones, which was taken as a threat against his two daughters.

Security was immediately strengthened around the Premier and his family. Police linked the fake Facebook account and message to a man who was due to leave the country within a fortnight.

He has been charged with using a carriage service to menace, harass or cause offence, which carries a maximum penalty of three years in jail.

The man's grievance with the Premier was unclear, but it is understood he was not a criminal motorcycle gang member.

It's the latest scare for Mr Newman and his wife after the couple's home address and mobile phone numbers were leaked on to social media last year in a major security breach.

Protesters against the bikie crackdown spread the details online, contributing to a flood of abusive calls and messages.

Police have confirmed a man was due to appear in court on Thursday over the latest incident.

Opposition Leader Annastacia Palaszczuk has thrown her support behind Mr Newman.

"It's completely unacceptable what that person is alleged to have done," Ms Palaszczuk said on Sunday.

"I would just hope and urge people out there to act responsibly.

"Security is a very real and serious issue. Our leaders are there to represent the community and the community should act responsibly towards those elected members. Elected members have a tough job."