TV star Roseanne Barr posted an unusual Twitter message on Friday night

Television star Roseanne Barr has posted an unusual message praising President Donald Trump for freeing 'children held in bondage', in an apparent reference to a conspiracy theory about satanic child sex abuse at the highest levels of government.

'President Trump has freed so many children held in bondage to pimps all over this world. Hundreds each month. He has broken up trafficking rings in high places everywhere,' Barr tweeted on Friday.

'I disagree on some things, but give him benefit of doubt-4 now,' she continued.

After initial confusion, Barr retweeted several links reporting recent law enforcement initiatives against human trafficking, including a March 13 White House statement announcing that DHS had made 1,602 arrests and 578 convictions in trafficking cases in 2017.

But for many, Barr's cryptic message, which came on the heels of her wildly successful sitcom reboot, appeared to be a callback to earlier mentions she has made of the 'QAnon' conspiracy theory.

In response to the storm of speculation, Barr posted again a few hours after the initial tweet: 'I have worked with victims of trafficking for decades & supported the fight against it. Sorry to have mentioned it here. It's not the place.'

It comes on the heels of Barr's wildly successful sitcom reboot on Tuesday (pictured)

Also known as 'The Storm', the QAnon theory is based on a series of anonymous and highly cryptic posts on the message board 4Chan, which purport to be written by a high-level insider at the Trump White House.

Q is a reference to 'Q-clearance', the Department of Energy security classification that offers the broadest level of access to Top Secret and Secret Restricted Data granted by the US government.

Though Q's posts are sometimes cryptic to the point of nonsense, in broad strokes the theory maintains that Trump is locked in a secret battle with 'evil' elements at the highest level of government.

The theory references earlier conspiracy theories such as Pizzagate, purporting that top-level Democrats are engaged in satanic child sex abuse and child sex trafficking.

One of Q's only specific predictions, that Hillary Clinton's campaign manager John Podesta would be arrested on November 3, did not come to pass.

Nevertheless, the theory fired the imaginations of many who envision The Storm as an imminent domestic military crackdown and purge targeting the Trump Administration's foes.

Q posted this fan-created graphic on March 4. It purports to show that Q predicted the contents of a DoD tweet in advance, about a documentary containing a mug with the letter 'Q'

Barr has previously dabbled in the conspiracy. On November 17, she posted two tweets saying 'Who is Q?' and 'Tell Qanon to DM me in the nexxt 24 hours'.

Shortly after Barr sent the messages, her Twitter account went offline, stoking rumors of a vast conspiracy.

Her account came back online a few hours later, with around 200,000 followers removed.

She issued a message saying 'I am OK and back. explanation later on'.

So far, she has not issued any explanation of the incident.

Barr's Tuesday premier of the Roseanne reboot drew some 18million viewers, making it a smashing success.

Trump even called to congratulate Barr, a Trump supporter herself whose sitcom aims to portray the real-life concerns of his working-class base.