A One Nation senator has accused the ABC of colluding with Islamic State and risking the lives of Australian soldiers.

Pauline Hanson and her bloc of senators have launched an extraordinary attack against the national broadcaster for "leaking" details of a trip to the Middle East.

One Nation senator Malcolm Roberts is the latest to weigh in after a planned parliamentary delegation to Afghanistan was scrapped after the trip was flagged on the ABC.

"Their ABC put our digger's lives at risk so as to execute a political hit on Senator Hanson. The ABC have declared Jihad on Aussie diggers. They have a fatwa on Pauline Hanson," Senator Roberts posted to Facebook on Wednesday.

Malcolm Roberts Facebook

"The ABC's actions in revealing the ANZAC day visit to diggers shows their willingness to collude with ISIS and other terrorists in identifying Australian targets, including troops.

"The ABC has for a long time been harbingers of terror apologists. This proves their Jihad sympathy."

Senator Roberts claimed the ABC had gone to ground, refusing to comment on the "gross security breach".

"Just like an ISIS attack, the cowards make their hit and then scuttle away into the sand. Like snakes," he said.

Senator Roberts' spray followed his One Nation colleague Brian Burston threatening to oppose government bills if ABC funding was not slashed in the May budget.

The ABC has been contacted for comment.

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